chore(deps-dev): Update mkdocs-material requirement from ~=9.6.16 to ~=9.6.18 in /gh-pages (#4892)

Updates the requirements on [mkdocs-material](https://github.com/squidfunk/mkdocs-material) to permit the latest version.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a href="https://github.com/squidfunk/mkdocs-material/releases">mkdocs-material's releases</a>.</em></p>
<blockquote>
<h2>mkdocs-material-9.6.18</h2>
<ul>
<li>Updated Azerbaijani translations</li>
<li>Fixed last compat issues with <a href="https://github.com/mitsuhiko/minijinja">minijinja</a>, now 100% compatible</li>
</ul>
</blockquote>
</details>
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a href="https://github.com/squidfunk/mkdocs-material/blob/master/CHANGELOG">mkdocs-material's changelog</a>.</em></p>
<blockquote>
<p>mkdocs-material-9.6.18 (2025-08-22)</p>
<ul>
<li>Updated Azerbaijani translations</li>
<li>Fixed last compat issues with [minijinja], now 100% compatible</li>
</ul>
<p>mkdocs-material-9.6.17 (2025-08-15)</p>
<ul>
<li>Fixed <a href="https://redirect.github.com/squidfunk/mkdocs-material/issues/8396">#8396</a>: Videos do not autoplay when inside a content tab</li>
<li>Fixed <a href="https://redirect.github.com/squidfunk/mkdocs-material/issues/8394">#8394</a>: Stroke width not effective in Mermaid.js diagrams</li>
<li>Fixed disappearing version selector when hiding page title</li>
</ul>
<p>mkdocs-material-9.6.16 (2025-07-26)</p>
<ul>
<li>Fixed <a href="https://redirect.github.com/squidfunk/mkdocs-material/issues/8349">#8349</a>: Info plugin doesn't correctly detect virtualenv in some cases</li>
<li>Fixed <a href="https://redirect.github.com/squidfunk/mkdocs-material/issues/8334">#8334</a>: Find-in-page detects matches in hidden search result list</li>
</ul>
<p>mkdocs-material-9.6.15 (2025-07-01)</p>
<ul>
<li>Updated Mongolian translations</li>
<li>Improved semantic markup of &quot;edit this page&quot; button</li>
<li>Improved info plugin virtual environment resolution</li>
<li>Fixed <a href="https://redirect.github.com/squidfunk/mkdocs-material/issues/8291">#8291</a>: Large font size setting throws of breakpoints in JavaScript</li>
</ul>
<p>mkdocs-material-9.6.14 (2025-05-13)</p>
<ul>
<li>Fixed <a href="https://redirect.github.com/squidfunk/mkdocs-material/issues/8215">#8215</a>: Social plugin crashes when CairoSVG is updated to 2.8</li>
</ul>
<p>mkdocs-material-9.6.13 (2025-05-10)</p>
<ul>
<li>Fixed <a href="https://redirect.github.com/squidfunk/mkdocs-material/issues/8204">#8204</a>: Annotations showing list markers in print view</li>
<li>Fixed <a href="https://redirect.github.com/squidfunk/mkdocs-material/issues/8153">#8153</a>: Improve style of cardinality symbols in Mermaid.js ER diagrams</li>
</ul>
<p>mkdocs-material-9.6.12 (2025-04-17)</p>
<ul>
<li>Fixed <a href="https://redirect.github.com/squidfunk/mkdocs-material/issues/8158">#8158</a>: Flip footnote back reference icon for right-to-left languages</li>
</ul>
<p>mkdocs-material-9.6.11 (2025-04-01)</p>
<ul>
<li>Updated Docker image to latest Alpine Linux</li>
<li>Bump required Jinja version to 3.1</li>
<li>Fixed <a href="https://redirect.github.com/squidfunk/mkdocs-material/issues/8133">#8133</a>: Jinja filter <code>items</code> not available (9.6.10 regression)</li>
<li>Fixed <a href="https://redirect.github.com/squidfunk/mkdocs-material/issues/8128">#8128</a>: Search plugin not entirely disabled via enabled setting</li>
</ul>
<p>mkdocs-material-9.6.10 (2025-03-30)</p>
<p>This version is a pure refactoring release, and does not contain new features
or bug fixes. It strives to improve the compatibility of our templates with
alternative Jinja-like template engines that we're currently exploring,
including minijinja.</p>

</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="https://github.com/squidfunk/mkdocs-material/commit/51bc7ba063d3e97f9e7bf1e7acfd107e32ac92b7"><code>51bc7ba</code></a> Prepare 9.6.18 release</li>
<li><a href="https://github.com/squidfunk/mkdocs-material/commit/fe4a4314d3c39274de8dd3bb8ab1120520d839cc"><code>fe4a431</code></a> Updated dependencies</li>
<li><a href="https://github.com/squidfunk/mkdocs-material/commit/3b3c632c4e1308ebc597290192f0f435ca6e3a6c"><code>3b3c632</code></a> Updated Azerbaijani translations</li>
<li><a href="https://github.com/squidfunk/mkdocs-material/commit/26d6e5e3828172bc11502d73f1ccfc8760ea0588"><code>26d6e5e</code></a> Improved compatibility with minijinja</li>
<li><a href="https://github.com/squidfunk/mkdocs-material/commit/c79364a7e0af950022cb4d2c0528e11beaccdbf8"><code>c79364a</code></a> Fixed last minijinja compat issues in templates</li>
<li><a href="https://github.com/squidfunk/mkdocs-material/commit/c89a66bf39bb7f472e925753367ff8e464e0d683"><code>c89a66b</code></a> Updated changelog</li>
<li><a href="https://github.com/squidfunk/mkdocs-material/commit/6fb115b1a8c32f90da5742c9b314621ad40f7551"><code>6fb115b</code></a> Prepare 9.6.17 release</li>
<li><a href="https://github.com/squidfunk/mkdocs-material/commit/f3bf8b340b306ff81ac3363cf490f3466a7ca6ed"><code>f3bf8b3</code></a> Fixed linter errors</li>
<li><a href="https://github.com/squidfunk/mkdocs-material/commit/b1ad1bc8f5d05aac2946a19c5c9dd623625b7bd4"><code>b1ad1bc</code></a> Updated dependencies</li>
<li><a href="https://github.com/squidfunk/mkdocs-material/commit/83055c1157ca1aa736a404ccf84e222cf4f1823d"><code>83055c1</code></a> Fixed linter errors</li>
<li>Additional commits viewable in <a href="https://github.com/squidfunk/mkdocs-material/compare/9.6.16...9.6.18">compare view</a></li>
</ul>
</details>
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gh-pages/requirements-dev.txt

@@ -1,4 +1,4 @@
 mkdocs~=1.6.1
 mkdocs-awesome-pages-plugin~=2.10.1
-mkdocs-material~=9.6.16
+mkdocs-material~=9.6.18
 mkdocs-git-revision-date-plugin~=0.3.2