Bump mako from 1.2.0 to 1.2.2 in /examples/research_projects/decision_transformer
Bumps [mako](https://github.com/sqlalchemy/mako) from 1.2.0 to 1.2.2.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a href="https://github.com/sqlalchemy/mako/releases">mako's releases</a>.</em></p>
<blockquote>
<h1>1.2.2</h1>
<p>Released: Mon Aug 29 2022</p>
<h2>bug</h2>
<ul>
<li>
<p><strong>[bug] [lexer]</strong> Fixed issue in lexer where the regexp used to match tags would not
correctly interpret quoted sections individually. While this parsing issue
still produced the same expected tag structure later on, the mis-handling
of quoted sections was also subject to a regexp crash if a tag had a large
number of quotes within its quoted sections.</p>
<p>References: <a href="https://github-redirect.dependabot.com/sqlalchemy/mako/issues/366">#366</a></p>
</li>
</ul>
<h1>1.2.1</h1>
<p>Released: Thu Jun 30 2022</p>
<h2>bug</h2>
<ul>
<li>
<p><strong>[bug] [tests]</strong> Various fixes to the test suite in the area of exception message rendering
to accommodate for variability in Python versions as well as Pygments.</p>
<p>References: <a href="https://github-redirect.dependabot.com/sqlalchemy/mako/issues/360">#360</a></p>
</li>
</ul>
<h2>misc</h2>
<ul>
<li>
<p><strong>[performance]</strong> Optimized some codepaths within the lexer/Python code generation process,
improving performance for generation of templates prior to their being
cached. Pull request courtesy Takuto Ikuta.</p>
<p>References: <a href="https://github-redirect.dependabot.com/sqlalchemy/mako/issues/361">#361</a></p>
</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li>See full diff in <a href="https://github.com/sqlalchemy/mako/commits">compare view</a></li>
</ul>
</details>
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