Bump jinja2 from 2.11.2 to 2.11.3 in /examples/research_projects/lxmert
Bumps [jinja2](https://github.com/pallets/jinja) from 2.11.2 to 2.11.3.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a href="https://github.com/pallets/jinja/releases">jinja2's releases</a>.</em></p>
<blockquote>
<h2>2.11.3</h2>
<p>This contains a fix for a speed issue with the <code>urlize</code> filter. <code>urlize</code> is likely to be called on untrusted user input. For certain inputs some of the regular expressions used to parse the text could take a very long time due to backtracking. As part of the fix, the email matching became slightly stricter. The various speedups apply to <code>urlize</code> in general, not just the specific input cases.</p>
<ul>
<li>PyPI: <a href="https://pypi.org/project/Jinja2/2.11.3/">https://pypi.org/project/Jinja2/2.11.3/</a></li>
<li>Changes: <a href="https://jinja.palletsprojects.com/en/2.11.x/changelog/#version-2-11-3">https://jinja.palletsprojects.com/en/2.11.x/changelog/#version-2-11-3</a></li>
</ul>
</blockquote>
</details>
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a href="https://github.com/pallets/jinja/blob/master/CHANGES.rst">jinja2's changelog</a>.</em></p>
<blockquote>
<h2>Version 2.11.3</h2>
<p>Released 2021-01-31</p>
<ul>
<li>Improve the speed of the <code>urlize</code> filter by reducing regex
backtracking. Email matching requires a word character at the start
of the domain part, and only word characters in the TLD. :pr:<code>1343</code></li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="https://github.com/pallets/jinja/commit/cf215390d4a4d6f0a4de27e2687eed176878f13d"><code>cf21539</code></a> release version 2.11.3</li>
<li><a href="https://github.com/pallets/jinja/commit/15ef8f09b659f9100610583938005a7a10472d4d"><code>15ef8f0</code></a> Merge pull request <a href="https://github-redirect.dependabot.com/pallets/jinja/issues/1343">#1343</a> from pallets/urlize-speedup</li>
<li><a href="https://github.com/pallets/jinja/commit/ef658dc3b6389b091d608e710a810ce8b87995b3"><code>ef658dc</code></a> speed up urlize matching</li>
<li><a href="https://github.com/pallets/jinja/commit/eeca0fecc3318d43f61bc340ad61db641b861ade"><code>eeca0fe</code></a> Merge pull request <a href="https://github-redirect.dependabot.com/pallets/jinja/issues/1207">#1207</a> from mhansen/patch-1</li>
<li><a href="https://github.com/pallets/jinja/commit/2dd769111cbb1a2637f805b3b4c652ec8096d371"><code>2dd7691</code></a> Merge pull request <a href="https://github-redirect.dependabot.com/pallets/jinja/issues/1209">#1209</a> from mhansen/patch-3</li>
<li><a href="https://github.com/pallets/jinja/commit/48929401db7228db04dfd8e88115dd5c30dc2d86"><code>4892940</code></a> do_dictsort: update example ready to copy/paste</li>
<li><a href="https://github.com/pallets/jinja/commit/7db7d336ba12574e6205fdd929386fd529e3fad4"><code>7db7d33</code></a> api.rst: bugfix in docs, import PackageLoader</li>
<li><a href="https://github.com/pallets/jinja/commit/9ec465baefe32e305bd4e61da49e6c39360c194e"><code>9ec465b</code></a> fix changelog header</li>
<li>See full diff in <a href="https://github.com/pallets/jinja/compare/2.11.2...2.11.3">compare view</a></li>
</ul>
</details>
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