chore(deps-dev): update mkdocs-material requirement from ~=8.1.3 to ~…

…=8.1.4 in /gh-pages (#3313)

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-8.1.4</h2>
<ul>
<li>Added indicator to navigation expander icon</li>
<li>Improved support for reduced motion preference</li>
<li>Fixed jitter of active content tab indicator</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-8.1.4+insiders-4.5.1 (2022-01-02)</p>
<ul>
<li>Added support for setting initial state of cookie consent</li>
<li>Fixed <a href="https://github-redirect.dependabot.com/squidfunk/mkdocs-material/issues/3396">#3396</a>: Disappearing link in navigation due to Safari bug</li>
</ul>
<p>mkdocs-material-8.1.4 (2022-01-02)</p>
<ul>
<li>Added indicator to navigation expander icon</li>
<li>Improved support for reduced motion preference</li>
<li>Fixed jitter of active content tab indicator</li>
</ul>
<p>mkdocs-material-8.1.3 (2021-12-19)</p>
<ul>
<li>Added animation to active content tab indicator</li>
<li>Fixed <a href="https://github-redirect.dependabot.com/squidfunk/mkdocs-material/issues/3360">#3360</a>: Highlighted lines add blank lines in copied text</li>
<li>Fixed usage of subsequent index files when using section index pages</li>
</ul>
<p>mkdocs-material-8.1.2+insiders-4.5.0 (2021-12-16)</p>
<ul>
<li>Added support for navigation icons</li>
</ul>
<p>mkdocs-material-8.1.2 (2021-12-15)</p>
<ul>
<li>Switched CSS sources to logical properties</li>
<li>Added transformation of logical properties to ltr/rtl equivalents</li>
<li>Fixed spacing for admonitions inside lists (8.1.1 regression)</li>
</ul>
<p>mkdocs-material-8.1.1 (2021-12-13)</p>
<ul>
<li>Added support for #only-light and #only-dark image hash fragments</li>
<li>Fixed copy-to-clipboard adding blank lines when using line anchors</li>
<li>Fixed code annotation directionality for right-to-left languages</li>
<li>Fixed header title positioning for right-to-left languages</li>
<li>Fixed admonition borders for right-to-left languages (8.0.0 regression)</li>
<li>Fixed footer navigation link positioning (8.0.0 regression)</li>
<li>Fixed footer navigation title breaking out of container when too long</li>
<li>Fixed shrinking arrow in navigation title when too long</li>
<li>Fixed <a href="https://github-redirect.dependabot.com/squidfunk/mkdocs-material/issues/3343">#3343</a>: Filtered stopwords appear as missing search terms</li>
<li>Fixed <a href="https://github-redirect.dependabot.com/squidfunk/mkdocs-material/issues/3346">#3346</a>: Site unusable due to usage of :not() (Firefox 78 ESR)</li>
</ul>
<p>mkdocs-material-8.1.0+insiders-4.4.0 (2021-12-10)</p>
<ul>
<li>Added support for code annotation anchor links (deep linking)</li>
<li>Added new code annotation syntax modifier to strip comment</li>
<li>Updated German translations for cookie consent</li>
</ul>
<p>mkdocs-material-8.1.0 (2021-12-10)</p>
<ul>
<li>Added basic support for code block line anchors</li>
<li>Switched code annotation markers to + signs to improve usability</li>
</ul>

</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="https://github.com/squidfunk/mkdocs-material/commit/60067b7ba6129574a2d445a6feb1158d27981efc"><code>60067b7</code></a> Prepare 8.1.4 release</li>
<li><a href="https://github.com/squidfunk/mkdocs-material/commit/7db5b8ab8bc9aa8200bd1bce82bb38656d396037"><code>7db5b8a</code></a> Updated dependencies</li>
<li><a href="https://github.com/squidfunk/mkdocs-material/commit/7d8165cda6d93894c533444349fa24cf08e6fe1d"><code>7d8165c</code></a> Improved support for reduced motion media</li>
<li><a href="https://github.com/squidfunk/mkdocs-material/commit/37bd327763dbceae329204278fd22080b3280748"><code>37bd327</code></a> Documentation</li>
<li><a href="https://github.com/squidfunk/mkdocs-material/commit/dc1d6786a45ead5265607197c2bd5564ed937262"><code>dc1d678</code></a> Documentation</li>
<li><a href="https://github.com/squidfunk/mkdocs-material/commit/6669ee0218413b70b6ca64c2aa5f2e32fdd265e9"><code>6669ee0</code></a> Updated blog article</li>
<li><a href="https://github.com/squidfunk/mkdocs-material/commit/b83983354c52278db660c8a388ea2a357dc1f166"><code>b839833</code></a> Added documentation for custom cookie state</li>
<li><a href="https://github.com/squidfunk/mkdocs-material/commit/db5eee54aa7edb92140bfbdc276979db6263267f"><code>db5eee5</code></a> Improved installation instructions</li>
<li><a href="https://github.com/squidfunk/mkdocs-material/commit/4d7f3d6dbd3d90e902a0f864c697aa6dc269acf9"><code>4d7f3d6</code></a> Documentation</li>
<li><a href="https://github.com/squidfunk/mkdocs-material/commit/7f4b1cb7f2a190b2a773d4b38bbe259c4a248780"><code>7f4b1cb</code></a> Documentation</li>
<li>Additional commits viewable in <a href="https://github.com/squidfunk/mkdocs-material/compare/8.1.3...8.1.4">compare view</a></li>
</ul>
</details>
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</details>

gh-pages/requirements-dev.txt

@@ -1,4 +1,4 @@
 mkdocs~=1.2.3
 mkdocs-awesome-pages-plugin~=2.6.0
-mkdocs-material~=8.1.3
+mkdocs-material~=8.1.4
 mkdocs-git-revision-date-plugin~=0.3.1