Bump nbconvert from 6.3.0 to 6.5.1 in /examples/research_projects/lxmert
Bumps [nbconvert](https://github.com/jupyter/nbconvert) from 6.3.0 to 6.5.1.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a href="https://github.com/jupyter/nbconvert/releases">nbconvert's releases</a>.</em></p>
<blockquote>
<h2>Release 6.5.1</h2>
<p>No release notes provided.</p>
<h2>6.5.0</h2>
<h2>What's Changed</h2>
<ul>
<li>Drop dependency on testpath. by <a href="https://github.com/anntzer"><code>@​anntzer</code></a> in <a href="https://github-redirect.dependabot.com/jupyter/nbconvert/pull/1723">jupyter/nbconvert#1723</a></li>
<li>Adopt pre-commit by <a href="https://github.com/blink1073"><code>@​blink1073</code></a> in <a href="https://github-redirect.dependabot.com/jupyter/nbconvert/pull/1744">jupyter/nbconvert#1744</a></li>
<li>Add pytest settings and handle warnings by <a href="https://github.com/blink1073"><code>@​blink1073</code></a> in <a href="https://github-redirect.dependabot.com/jupyter/nbconvert/pull/1745">jupyter/nbconvert#1745</a></li>
<li>Apply Autoformatters by <a href="https://github.com/blink1073"><code>@​blink1073</code></a> in <a href="https://github-redirect.dependabot.com/jupyter/nbconvert/pull/1746">jupyter/nbconvert#1746</a></li>
<li>Add git-blame-ignore-revs by <a href="https://github.com/blink1073"><code>@​blink1073</code></a> in <a href="https://github-redirect.dependabot.com/jupyter/nbconvert/pull/1748">jupyter/nbconvert#1748</a></li>
<li>Update flake8 config by <a href="https://github.com/blink1073"><code>@​blink1073</code></a> in <a href="https://github-redirect.dependabot.com/jupyter/nbconvert/pull/1749">jupyter/nbconvert#1749</a></li>
<li>support bleach 5, add packaging and tinycss2 dependencies by <a href="https://github.com/bollwyvl"><code>@​bollwyvl</code></a> in <a href="https://github-redirect.dependabot.com/jupyter/nbconvert/pull/1755">jupyter/nbconvert#1755</a></li>
<li>[pre-commit.ci] pre-commit autoupdate by <a href="https://github.com/pre-commit-ci"><code>@​pre-commit-ci</code></a> in <a href="https://github-redirect.dependabot.com/jupyter/nbconvert/pull/1752">jupyter/nbconvert#1752</a></li>
<li>update cli example by <a href="https://github.com/leahecole"><code>@​leahecole</code></a> in <a href="https://github-redirect.dependabot.com/jupyter/nbconvert/pull/1753">jupyter/nbconvert#1753</a></li>
<li>Clean up pre-commit by <a href="https://github.com/blink1073"><code>@​blink1073</code></a> in <a href="https://github-redirect.dependabot.com/jupyter/nbconvert/pull/1757">jupyter/nbconvert#1757</a></li>
<li>Clean up workflows by <a href="https://github.com/blink1073"><code>@​blink1073</code></a> in <a href="https://github-redirect.dependabot.com/jupyter/nbconvert/pull/1750">jupyter/nbconvert#1750</a></li>
</ul>
<h2>New Contributors</h2>
<ul>
<li><a href="https://github.com/pre-commit-ci"><code>@​pre-commit-ci</code></a> made their first contribution in <a href="https://github-redirect.dependabot.com/jupyter/nbconvert/pull/1752">jupyter/nbconvert#1752</a></li>
</ul>
<p><strong>Full Changelog</strong>: <a href="https://github.com/jupyter/nbconvert/compare/6.4.5...6.5">https://github.com/jupyter/nbconvert/compare/6.4.5...6.5</a></p>
<h2>6.4.3</h2>
<h2>What's Changed</h2>
<ul>
<li>Add section to <code>customizing</code> showing how to use template inheritance by <a href="https://github.com/stefanv"><code>@​stefanv</code></a> in <a href="https://github-redirect.dependabot.com/jupyter/nbconvert/pull/1719">jupyter/nbconvert#1719</a></li>
<li>Remove ipython genutils by <a href="https://github.com/rgs258"><code>@​rgs258</code></a> in <a href="https://github-redirect.dependabot.com/jupyter/nbconvert/pull/1727">jupyter/nbconvert#1727</a></li>
<li>Update changelog for 6.4.3 by <a href="https://github.com/blink1073"><code>@​blink1073</code></a> in <a href="https://github-redirect.dependabot.com/jupyter/nbconvert/pull/1728">jupyter/nbconvert#1728</a></li>
</ul>
<h2>New Contributors</h2>
<ul>
<li><a href="https://github.com/stefanv"><code>@​stefanv</code></a> made their first contribution in <a href="https://github-redirect.dependabot.com/jupyter/nbconvert/pull/1719">jupyter/nbconvert#1719</a></li>
<li><a href="https://github.com/rgs258"><code>@​rgs258</code></a> made their first contribution in <a href="https://github-redirect.dependabot.com/jupyter/nbconvert/pull/1727">jupyter/nbconvert#1727</a></li>
</ul>
<p><strong>Full Changelog</strong>: <a href="https://github.com/jupyter/nbconvert/compare/6.4.2...6.4.3">https://github.com/jupyter/nbconvert/compare/6.4.2...6.4.3</a></p>
<h2>6.4.0</h2>
<h2>What's Changed</h2>
<ul>
<li>Optionally speed up validation by <a href="https://github.com/gwincr11"><code>@​gwincr11</code></a> in <a href="https://github-redirect.dependabot.com/jupyter/nbconvert/pull/1672">jupyter/nbconvert#1672</a></li>
<li>Adding missing div compared to JupyterLab DOM structure by <a href="https://github.com/SylvainCorlay"><code>@​SylvainCorlay</code></a> in <a href="https://github-redirect.dependabot.com/jupyter/nbconvert/pull/1678">jupyter/nbconvert#1678</a></li>
<li>Allow passing extra args to code highlighter by <a href="https://github.com/yuvipanda"><code>@​yuvipanda</code></a> in <a href="https://github-redirect.dependabot.com/jupyter/nbconvert/pull/1683">jupyter/nbconvert#1683</a></li>
<li>Prevent page breaks in outputs when printing by <a href="https://github.com/SylvainCorlay"><code>@​SylvainCorlay</code></a> in <a href="https://github-redirect.dependabot.com/jupyter/nbconvert/pull/1679">jupyter/nbconvert#1679</a></li>
<li>Add collapsers to template by <a href="https://github.com/SylvainCorlay"><code>@​SylvainCorlay</code></a> in <a href="https://github-redirect.dependabot.com/jupyter/nbconvert/pull/1689">jupyter/nbconvert#1689</a></li>
<li>Fix recent pandoc latex tables by adding calc and array (<a href="https://github-redirect.dependabot.com/jupyter/nbconvert/issues/1536">#1536</a>, <a href="https://github-redirect.dependabot.com/jupyter/nbconvert/issues/1566">#1566</a>) by <a href="https://github.com/cgevans"><code>@​cgevans</code></a> in <a href="https://github-redirect.dependabot.com/jupyter/nbconvert/pull/1686">jupyter/nbconvert#1686</a></li>
<li>Add an invalid notebook error by <a href="https://github.com/gwincr11"><code>@​gwincr11</code></a> in <a href="https://github-redirect.dependabot.com/jupyter/nbconvert/pull/1675">jupyter/nbconvert#1675</a></li>
<li>Fix typos in execute.py by <a href="https://github.com/TylerAnderson22"><code>@​TylerAnderson22</code></a> in <a href="https://github-redirect.dependabot.com/jupyter/nbconvert/pull/1692">jupyter/nbconvert#1692</a></li>
<li>Modernize latex greek math handling (partially fixes <a href="https://github-redirect.dependabot.com/jupyter/nbconvert/issues/1673">#1673</a>) by <a href="https://github.com/cgevans"><code>@​cgevans</code></a> in <a href="https://github-redirect.dependabot.com/jupyter/nbconvert/pull/1687">jupyter/nbconvert#1687</a></li>
<li>Fix use of deprecated API and update test matrix by <a href="https://github.com/blink1073"><code>@​blink1073</code></a> in <a href="https://github-redirect.dependabot.com/jupyter/nbconvert/pull/1696">jupyter/nbconvert#1696</a></li>
<li>Update nbconvert_library.ipynb by <a href="https://github.com/letterphile"><code>@​letterphile</code></a> in <a href="https://github-redirect.dependabot.com/jupyter/nbconvert/pull/1695">jupyter/nbconvert#1695</a></li>
<li>Changelog for 6.4 by <a href="https://github.com/blink1073"><code>@​blink1073</code></a> in <a href="https://github-redirect.dependabot.com/jupyter/nbconvert/pull/1697">jupyter/nbconvert#1697</a></li>
</ul>
<h2>New Contributors</h2>
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</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="https://github.com/jupyter/nbconvert/commit/7471b75a506b2fec776613e50e4f2234b97f3c8e"><code>7471b75</code></a> Release 6.5.1</li>
<li><a href="https://github.com/jupyter/nbconvert/commit/c1943e0e9fd0ad6abd7d8dae380474cca4b04a31"><code>c1943e0</code></a> Fix pre-commit</li>
<li><a href="https://github.com/jupyter/nbconvert/commit/8685e9378086e8d82a0df92505fe386095f929ad"><code>8685e93</code></a> Fix tests</li>
<li><a href="https://github.com/jupyter/nbconvert/commit/0abf2906bc6c7170c8d70bc0df6995d21c5aeaf1"><code>0abf290</code></a> Run black and prettier</li>
<li><a href="https://github.com/jupyter/nbconvert/commit/418d545ae596d95f5ea82d141c68fd1abc99f1a6"><code>418d545</code></a> Run test on 6.x branch</li>
<li><a href="https://github.com/jupyter/nbconvert/commit/bef65d7ab2a469b01e4aa25f44c0f20326f7c7c5"><code>bef65d7</code></a> Convert input to string prior to escape HTML</li>
<li><a href="https://github.com/jupyter/nbconvert/commit/0818628718c4a5d3ddd671fbd4881bf176e7d6e2"><code>0818628</code></a> Check input type before escaping</li>
<li><a href="https://github.com/jupyter/nbconvert/commit/b206470f9ecd71b006a37dd1298dd3d9e3dd46dd"><code>b206470</code></a> GHSL-2021-1017, GHSL-2021-1020, GHSL-2021-1021</li>
<li><a href="https://github.com/jupyter/nbconvert/commit/a03cbb8a8d04d47aefec51e7b1b816045682aed5"><code>a03cbb8</code></a> GHSL-2021-1026, GHSL-2021-1025</li>
<li><a href="https://github.com/jupyter/nbconvert/commit/48fe71eb3335caf4e03166e56e0d16efcfbeaf44"><code>48fe71e</code></a> GHSL-2021-1024</li>
<li>Additional commits viewable in <a href="https://github.com/jupyter/nbconvert/compare/6.3.0...6.5.1">compare view</a></li>
</ul>
</details>
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