chore(deps-dev): Update mkdocs-material requirement from ~=9.1.18 to …

…~=9.1.19 in /gh-pages (#4189)

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-9.1.19</h2>
<ul>
<li>Added support for MkDocs 1.5+</li>
<li>Fixed <a href="https://redirect.github.com/squidfunk/mkdocs-material/issues/5699">#5699</a>: Improve error reporting in social plugin</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-9.1.19 (2023-07-18)</p>
<ul>
<li>Added support for MkDocs 1.5+</li>
<li>Fixed <a href="https://redirect.github.com/squidfunk/mkdocs-material/issues/5699">#5699</a>: Improve error reporting in social plugin</li>
</ul>
<p>mkdocs-material-9.1.18+insiders-4.37.0 (2023-07-07)</p>
<ul>
<li>Added support for overriding social cards settings per page</li>
<li>Added new social card default/only/image layout</li>
<li>Improved resilience of optimize and social plugin</li>
<li>Fixed rendering bugs for pruned navigation items</li>
<li>Fixed jumping of content tabs anchor links when instant loading is enabled</li>
<li>Fixed <a href="https://redirect.github.com/squidfunk/mkdocs-material/issues/5676">#5676</a>: Optimize plugin doesn't check for pngquant</li>
</ul>
<p>mkdocs-material-9.1.18 (2023-07-03)</p>
<ul>
<li>Updated Danish translations</li>
<li>Added support for installing user requirements in Docker image</li>
<li>Fixed <a href="https://redirect.github.com/squidfunk/mkdocs-material/issues/5655">#5655</a>: Search separator with lookbehind breaks highlighting</li>
</ul>
<p>mkdocs-material-9.1.17+insiders-4.36.1 (2023-06-23)</p>
<ul>
<li>Fixed <a href="https://redirect.github.com/squidfunk/mkdocs-material/issues/5618">#5618</a>: Date comparison breaking for drafts in blog plugin</li>
</ul>
<p>mkdocs-material-9.1.17 (2023-06-23)</p>
<ul>
<li>Fixed <a href="https://redirect.github.com/squidfunk/mkdocs-material/issues/5633">#5633</a>: Code annotations with nested lists incorrectly mounted</li>
<li>Fixed <a href="https://redirect.github.com/squidfunk/mkdocs-material/issues/5628">#5628</a>: Regression in new social plugin configuration scheme</li>
</ul>
<p>mkdocs-material-9.1.16+insiders-4.36.0 (2023-06-15)</p>
<ul>
<li>Added support for instant prefetching to speed up slow connections</li>
<li>Improved stability of anchor link removal in built-in typeset plugin</li>
<li>Improved performance of regular expressions in typeset plugin</li>
<li>Removed unnecessary import test for cairosvg in optimize plugin</li>
<li>Fixed <a href="https://redirect.github.com/squidfunk/mkdocs-material/issues/5590">#5590</a>: regular expression for anchor link removal too greedy</li>
</ul>
<p>mkdocs-material-9.1.16 (2023-06-15)</p>
<ul>
<li>Updated Indonesian translations</li>
<li>Ensure scroll bar follows color scheme of operating system</li>
</ul>
<p>mkdocs-material-9.1.15+insiders-4.35.3 (2023-06-01)</p>
<ul>
<li>Fixed <a href="https://redirect.github.com/squidfunk/mkdocs-material/issues/5579">#5579</a>: Abbreviations in headlines filtered by typeset plugin</li>
</ul>
<p>mkdocs-material-9.1.15+insiders-4.35.2 (2023-05-29)</p>
<ul>
<li>Fixed <a href="https://redirect.github.com/squidfunk/mkdocs-material/issues/5555">#5555</a>: Blog plugin crashes when computing readtime for emojis</li>
</ul>

</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="https://github.com/squidfunk/mkdocs-material/commit/545fb274187ebeeceed6ea209065501777ade03b"><code>545fb27</code></a> Prepare 9.1.19 release</li>
<li><a href="https://github.com/squidfunk/mkdocs-material/commit/1ff2aec06d2b2967d98c075a2b794b4ed2253bfe"><code>1ff2aec</code></a> Updated documentation for line highlighting</li>
<li><a href="https://github.com/squidfunk/mkdocs-material/commit/e897b891258caf719136ae382ec5c9145d5ddcb2"><code>e897b89</code></a> Added support for MkDocs 1.5</li>
<li><a href="https://github.com/squidfunk/mkdocs-material/commit/4bb89266864ad8ac91efe2702b509446af520e61"><code>4bb8926</code></a> Updated dependencies</li>
<li><a href="https://github.com/squidfunk/mkdocs-material/commit/10b150112ea7b0e894419ce3351c17ac9e8e0cd7"><code>10b1501</code></a> Improved error reporting in social plugin</li>
<li><a href="https://github.com/squidfunk/mkdocs-material/commit/b3ade9fd3ac905bc93fb6ccdfdfeeecfed13cd3e"><code>b3ade9f</code></a> Updated dependencies</li>
<li><a href="https://github.com/squidfunk/mkdocs-material/commit/2331aa678bec2122123c5c51f33275fcd5cf4e45"><code>2331aa6</code></a> Fixed linter errors</li>
<li><a href="https://github.com/squidfunk/mkdocs-material/commit/3094b49844936b3ed01737ac2a3c08de97f9de0f"><code>3094b49</code></a> Updated dependencies</li>
<li><a href="https://github.com/squidfunk/mkdocs-material/commit/85fdf2a402ba9746bf89e18c74fb70d2dbb4c42f"><code>85fdf2a</code></a> Updated Premium sponsors</li>
<li><a href="https://github.com/squidfunk/mkdocs-material/commit/0fd163805e2b89c33c503a133d463025713b6818"><code>0fd1638</code></a> Updated Insiders changelog</li>
<li>Additional commits viewable in <a href="https://github.com/squidfunk/mkdocs-material/compare/9.1.18...9.1.19">compare view</a></li>
</ul>
</details>
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</details>

gh-pages/requirements-dev.txt

@@ -1,4 +1,4 @@
 mkdocs~=1.4.3
 mkdocs-awesome-pages-plugin~=2.9.1
-mkdocs-material~=9.1.18
+mkdocs-material~=9.1.19
 mkdocs-git-revision-date-plugin~=0.3.2