Bump pymdown-extensions from 9.11 to 10.0 in /engine (#1943)

Bumps
[pymdown-extensions](https://github.com/facelessuser/pymdown-extensions)
from 9.11 to 10.0.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/facelessuser/pymdown-extensions/releases">pymdown-extensions's
releases</a>.</em></p>
<blockquote>
<h2>10.0</h2>
<ul>
<li><strong>Break</strong>: Snippets: snippets will restrict snippets to
ensure they are under the <code>base_path</code> preventing snippets
relative to the <code>base_path</code> but not explicitly under it.
<code>restrict_base_path</code> can be set to <code>False</code> for
legacy
behavior.</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="5e750734b7"><code>5e75073</code></a>
Update JS doc deps</li>
<li><a
href="b7bb4878d6"><code>b7bb487</code></a>
Merge pull request from GHSA-jh85-wwv9-24hv</li>
<li>See full diff in <a
href="https://github.com/facelessuser/pymdown-extensions/compare/9.11...10.0">compare
view</a></li>
</ul>
</details>
<br />


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engine/requirements.txt

@@ -52,6 +52,6 @@ django-dbconn-retry==0.1.7
 django-ipware==4.0.2
 django-anymail==8.6
 django-deprecate-fields==0.1.1
-pymdown-extensions==9.11
+pymdown-extensions==10.0
 requests==2.29.0
 urllib3==1.26.15