chore(deps-dev): Update mkdocs-material requirement from ~=9.2.7 to ~…

…=9.2.8 in /gh-pages (#4261)

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-9.2.8</h2>
<ul>
<li>Updated Italian and Russian translations</li>
<li>Fixed <a href="https://redirect.github.com/squidfunk/mkdocs-material/issues/5952">#5952</a>: Combining blog and tags plugin leads to wrong links</li>
<li>Fixed <a href="https://redirect.github.com/squidfunk/mkdocs-material/issues/5951">#5951</a>: Blog plugin ignores post title in metadata</li>
<li>Fixed <a href="https://redirect.github.com/squidfunk/mkdocs-material/issues/5949">#5949</a>: Blog plugin ignores post linked in nav</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-9.2.8+insiders-4.40.4 (2023-09-04)</p>
<ul>
<li>Fixed privacy plugin choking on boolean HTML5 attributes</li>
<li>Fixed wrapping of inline code blocks in typeset table of contents</li>
<li>Fixed blog plugin error when running under dirty reload</li>
</ul>
<p>mkdocs-material-9.2.8 (2023-09-04)</p>
<ul>
<li>Updated Italian and Russian translations</li>
<li>Fixed <a href="https://redirect.github.com/squidfunk/mkdocs-material/issues/5952">#5952</a>: Combining blog and tags plugin leads to wrong links</li>
<li>Fixed <a href="https://redirect.github.com/squidfunk/mkdocs-material/issues/5951">#5951</a>: Blog plugin ignores post title in metadata</li>
<li>Fixed <a href="https://redirect.github.com/squidfunk/mkdocs-material/issues/5949">#5949</a>: Blog plugin ignores post linked in nav</li>
</ul>
<p>mkdocs-material-9-2.7+insiders-4.40.3 (2023-09-02)</p>
<ul>
<li>Fixed <a href="https://redirect.github.com/squidfunk/mkdocs-material/issues/5946">#5946</a>: Docker image missing pngquant for optimize plugin</li>
</ul>
<p>mkdocs-material-9.2.7 (2023-09-02)</p>
<ul>
<li>Switched dependencies to compatible release clauses</li>
<li>Removed readtime and lxml dependencies for blog plugin</li>
<li>Reduced size of Docker image to improve CI build performance</li>
<li>Fixed <a href="https://redirect.github.com/squidfunk/mkdocs-material/issues/5945">#5945</a>: Incorrect footer navigation for sibling pages of blog</li>
<li>Fixed <a href="https://redirect.github.com/squidfunk/mkdocs-material/issues/5939">#5939</a>: Page jumps when changing color palette (Firefox 117)</li>
<li>Fixed <a href="https://redirect.github.com/squidfunk/mkdocs-material/issues/5901">#5901</a>: Announcement bar reappears when using instant loading</li>
<li>Fixed <a href="https://redirect.github.com/squidfunk/mkdocs-material/issues/5824">#5824</a>: Allow to customize styles of sequence diagrams</li>
</ul>
<p>mkdocs-material-9-2.6+insiders-4.40.2 (2023-08-31)</p>
<ul>
<li>Added configurable error handling capabilities for social plugin</li>
<li>Fixed <a href="https://redirect.github.com/squidfunk/mkdocs-material/issues/5922">#5922</a>: Blog plugin shows no posts when building a standalone blog</li>
<li>Fixed <a href="https://redirect.github.com/squidfunk/mkdocs-material/issues/5914">#5914</a>: Tags plugin tags_extra_files errors (4.39.3 regression)</li>
<li>Fixed <a href="https://redirect.github.com/squidfunk/mkdocs-material/issues/5904">#5904</a>: Blog plugin sometimes excludes files (4.40.1 regression)</li>
</ul>
<p>mkdocs-material-9-2.6 (2023-08-31)</p>
<ul>
<li>Added Basque translations</li>
<li>Added template for simple redirects</li>
<li>Improved blog plugin interop by moving view generation to on_files</li>
<li>Fixed <a href="https://redirect.github.com/squidfunk/mkdocs-material/issues/5924">#5924</a>: Social plugin still checks dependencies when disabled</li>
<li>Fixed <a href="https://redirect.github.com/squidfunk/mkdocs-material/issues/5916">#5916</a>: Blog plugin crashes on Python 3.8 (9.2.0 regression)</li>
</ul>
<p>mkdocs-material-9-2.5+insiders-4.40.1 (2023-08-27)</p>
<ul>
<li>Fixed <a href="https://redirect.github.com/squidfunk/mkdocs-material/issues/5902">#5902</a>: ResizeObserver polyfill not detected by privacy plugin</li>
<li>Fixed empty category pages in blog plugin (4.40.0 regression)</li>
</ul>
<p>mkdocs-material-9-2.5 (2023-08-27)</p>
<ul>
<li>Fixed error in dirty serve mode when using blog plugin</li>
</ul>

</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="https://github.com/squidfunk/mkdocs-material/commit/a1adebac8ef4ef7ec874718e53224de6d232c616"><code>a1adeba</code></a> Updated changelogs</li>
<li><a href="https://github.com/squidfunk/mkdocs-material/commit/86d52b93cddfe1cb2ce7c6bef1100a55acd7e804"><code>86d52b9</code></a> Prepare 9.2.8 release</li>
<li><a href="https://github.com/squidfunk/mkdocs-material/commit/26b57bb2d8717c61179539fb6168c2946ba52b19"><code>26b57bb</code></a> Updated Russian translations (<a href="https://redirect.github.com/squidfunk/mkdocs-material/issues/5947">#5947</a>)</li>
<li><a href="https://github.com/squidfunk/mkdocs-material/commit/fc566cf0e2db557bf5678c1085c1802466a300a5"><code>fc566cf</code></a> Fixed further regression in blog plugin navigation</li>
<li><a href="https://github.com/squidfunk/mkdocs-material/commit/5e42517a22386ab49f6efae79b916d066efbd4ba"><code>5e42517</code></a> Updated dependencies</li>
<li><a href="https://github.com/squidfunk/mkdocs-material/commit/3b593142898189b77472978f1cf3a15f73790b08"><code>3b59314</code></a> Updated dependencies</li>
<li><a href="https://github.com/squidfunk/mkdocs-material/commit/682d1761e75f8f69b22abaffa8d577eccc470452"><code>682d176</code></a> Fixed further regression in blog plugin navigation</li>
<li><a href="https://github.com/squidfunk/mkdocs-material/commit/752aa5ce8836d803c13e986b5873a917b3f45d09"><code>752aa5c</code></a> Updated translations</li>
<li><a href="https://github.com/squidfunk/mkdocs-material/commit/c4d19cc854943aba54dd265f3dd06ab39eb2c1ce"><code>c4d19cc</code></a> Merge branch 'master' of github.com:squidfunk/mkdocs-material</li>
<li><a href="https://github.com/squidfunk/mkdocs-material/commit/12f866ddf58cede902e0fa6e3544eb93d912cecc"><code>12f866d</code></a> Updated dependencies</li>
<li>Additional commits viewable in <a href="https://github.com/squidfunk/mkdocs-material/compare/9.2.7...9.2.8">compare view</a></li>
</ul>
</details>
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</details>

gh-pages/requirements-dev.txt

@@ -1,4 +1,4 @@
 mkdocs~=1.5.2
 mkdocs-awesome-pages-plugin~=2.9.2
-mkdocs-material~=9.2.7
+mkdocs-material~=9.2.8
 mkdocs-git-revision-date-plugin~=0.3.2