chore(deps-dev): Update mkdocs-material requirement from ~=8.2.5 to ~…

…=8.2.8 in /gh-pages (#3447)

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-8.2.8</h2>
<ul>
<li>Bumped MkDocs version to 1.3.0 to mitigate breaking changes in Jinja</li>
<li>Reverted Jinja version range limitation (added in 8.2.7)</li>
<li>Improved styling of annotations and fixed borders of code blocks in tabs</li>
<li>Added background color to code blocks in focused/hovered links</li>
<li>Added check in tags plugin whether tags overview page exists</li>
<li>Fixed <a href="https://github-redirect.dependabot.com/squidfunk/mkdocs-material/issues/3744">#3744</a>: Content tab indicator on wrong position when using back button</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-8.2.8+insiders-4.12.0 (2022-03-27)</p>
<ul>
<li>Added support for card grids and grid layouts</li>
<li>Fixed <a href="https://github-redirect.dependabot.com/squidfunk/mkdocs-material/issues/3685">#3685</a>: Annotations sometimes broken when using instant loading</li>
<li>Fixed <a href="https://github-redirect.dependabot.com/squidfunk/mkdocs-material/issues/3742">#3742</a>: Automatically add Mermaid.js when building for offline usage</li>
</ul>
<p>mkdocs-material-8.2.8 (2022-03-27)</p>
<ul>
<li>Bumped MkDocs version to 1.3.0 to mitigate breaking changes in Jinja</li>
<li>Reverted Jinja version range limitation (added in 8.2.7)</li>
<li>Improved styling of annotations and fixed borders of code blocks in tabs</li>
<li>Added background color to code blocks in focused/hovered links</li>
<li>Added check in tags plugin whether tags overview page exists</li>
<li>Fixed <a href="https://github-redirect.dependabot.com/squidfunk/mkdocs-material/issues/3744">#3744</a>: Content tab indicator on wrong position when using back button</li>
</ul>
<p>mkdocs-material-8.2.7 (2022-03-24)</p>
<ul>
<li>Temporarily limit Jinja version range to &lt; 3.1 due to breaking changes</li>
</ul>
<p>mkdocs-material-8.2.6 (2022-03-23)</p>
<ul>
<li>Fixed <a href="https://github-redirect.dependabot.com/squidfunk/mkdocs-material/issues/3695">#3695</a>: Deprecation warning for unescaped backslashes in templates</li>
<li>Fixed <a href="https://github-redirect.dependabot.com/squidfunk/mkdocs-material/issues/3696">#3696</a>: Annotations not mounted in some Terraform code blocks</li>
<li>Fixed <a href="https://github-redirect.dependabot.com/squidfunk/mkdocs-material/issues/3698">#3698</a>: Annotations not mounted in long code blocks (8.2.5 regression)</li>
</ul>
<p>mkdocs-material-8.2.5+insiders-4.11.0 (2022-03-06)</p>
<ul>
<li>Added support for excluding external assets from privacy plugin</li>
</ul>
<p>mkdocs-material-8.2.5 (2022-03-06)</p>
<ul>
<li>Fixed <a href="https://github-redirect.dependabot.com/squidfunk/mkdocs-material/issues/3596">#3596</a>: Mermaid not working when headline with name 'Mermaid' present</li>
<li>Fixed <a href="https://github-redirect.dependabot.com/squidfunk/mkdocs-material/issues/3643">#3643</a>: Reduce time to render pages with thousands of code blocks</li>
<li>Fixed <a href="https://github-redirect.dependabot.com/squidfunk/mkdocs-material/issues/3665">#3665</a>: Missing styles for Mermaid.js flowcharts cluster labels</li>
</ul>
<p>mkdocs-material-8.2.4+insiders-4.10.1 (2022-03-02)</p>
<ul>
<li>Added missing build dependencies to Dockerfile</li>
<li>Fixed encoding issues in privacy plugin, now forcing UTF-8 encoding</li>
<li>Fixed <a href="https://github-redirect.dependabot.com/squidfunk/mkdocs-material/issues/3624">#3624</a>: Scroll to active navigation item unreliable in Firefox</li>
<li>Fixed <a href="https://github-redirect.dependabot.com/squidfunk/mkdocs-material/issues/3642">#3642</a>: Privacy plugin errors when font setting was omitted</li>
</ul>
<p>mkdocs-material-8.2.4 (2022-03-02)</p>
<ul>
<li>Fixed malformed Google Fonts URL when a font setting was omitted</li>
<li>Fixed <a href="https://github-redirect.dependabot.com/squidfunk/mkdocs-material/issues/3648">#3648</a>: Fixed specificity issue with admonitions in lists</li>
<li>Fixed <a href="https://github-redirect.dependabot.com/squidfunk/mkdocs-material/issues/3653">#3653</a>: Invalid outdated version banner URL when using instant loading</li>
</ul>
<p>mkdocs-material-8.2.3+insiders-4.10.0 (2022-02-27)</p>

</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="https://github.com/squidfunk/mkdocs-material/commit/ce43e6ae9d9cb3a137ebfaa0f16cc52e20285433"><code>ce43e6a</code></a> Prepare 8.2.8 release</li>
<li><a href="https://github.com/squidfunk/mkdocs-material/commit/e96f07ae3d87756bb300f6f513143b9b04b24f6f"><code>e96f07a</code></a> Added documentation for card grids</li>
<li><a href="https://github.com/squidfunk/mkdocs-material/commit/7418e7961a61d2cd5f8d6b5c16c2bdca74c380a3"><code>7418e79</code></a> Updated screenshot</li>
<li><a href="https://github.com/squidfunk/mkdocs-material/commit/7b1d1cc72b8ee26cab9df92349efd7a6b5e98da7"><code>7b1d1cc</code></a> Bump ansi-regex from 4.1.0 to 4.1.1 (<a href="https://github-redirect.dependabot.com/squidfunk/mkdocs-material/issues/3769">#3769</a>)</li>
<li><a href="https://github.com/squidfunk/mkdocs-material/commit/c9f92b922d557bf42bf35375440ca58c0e7156cd"><code>c9f92b9</code></a> Reverted pinning of Jinja2 version</li>
<li><a href="https://github.com/squidfunk/mkdocs-material/commit/6b91c8dc10b338e422dd6d446139301cd19cb065"><code>6b91c8d</code></a> Added background color to code blocks in hovered links</li>
<li><a href="https://github.com/squidfunk/mkdocs-material/commit/71dd84a0e9d496d9d64a581b60f947a720a6521e"><code>71dd84a</code></a> Improved styling of code annotations and fixed borders of code blocks in tabs</li>
<li><a href="https://github.com/squidfunk/mkdocs-material/commit/c7cc8f07ab92d31a996e3eb91e1a659a33a427ca"><code>c7cc8f0</code></a> Formatting</li>
<li><a href="https://github.com/squidfunk/mkdocs-material/commit/dfba03f15e884493c60d3f52adec1d9a86c76ba1"><code>dfba03f</code></a> Raise error in tags plugin when tags file does not exist</li>
<li><a href="https://github.com/squidfunk/mkdocs-material/commit/6322ecef42b998dea93038a2090f2d3f2041ba77"><code>6322ece</code></a> Merge branch 'master' of github.com:squidfunk/mkdocs-material</li>
<li>Additional commits viewable in <a href="https://github.com/squidfunk/mkdocs-material/compare/8.2.5...8.2.8">compare view</a></li>
</ul>
</details>
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</details>

gh-pages/requirements-dev.txt

@@ -1,4 +1,4 @@
 mkdocs~=1.3.0
 mkdocs-awesome-pages-plugin~=2.7.0
-mkdocs-material~=8.2.5
+mkdocs-material~=8.2.8
 mkdocs-git-revision-date-plugin~=0.3.2