build(deps): Bump autoprefixer from 10.4.18 to 10.4.19 in /website (#5327)

Bumps [autoprefixer](https://github.com/postcss/autoprefixer) from
10.4.18 to 10.4.19.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/postcss/autoprefixer/releases">autoprefixer's
releases</a>.</em></p>
<blockquote>
<h2>10.4.19</h2>
<ul>
<li>Removed <code>end value has mixed support, consider using
flex-end</code> warning since <code>end</code>/<code>start</code> now
have good support.</li>
</ul>
</blockquote>
</details>
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/postcss/autoprefixer/blob/main/CHANGELOG.md">autoprefixer's
changelog</a>.</em></p>
<blockquote>
<h2>10.4.19</h2>
<ul>
<li>Removed <code>end value has mixed support, consider using
flex-end</code> warning
since <code>end</code>/<code>start</code> now have good support.</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="8060e33a78"><code>8060e33</code></a>
Release 10.4.19 version</li>
<li><a
href="fe7bae4597"><code>fe7bae4</code></a>
Remove end→flex-end warning</li>
<li><a
href="5f6f362a1e"><code>5f6f362</code></a>
Update dependencies</li>
<li><a
href="13a86df5ab"><code>13a86df</code></a>
Move to flat ESLint config</li>
<li><a
href="b3e0579452"><code>b3e0579</code></a>
Update dependencies</li>
<li>See full diff in <a
href="https://github.com/postcss/autoprefixer/compare/10.4.18...10.4.19">compare
view</a></li>
</ul>
</details>
<br />


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website/package.json

@@ -23,7 +23,7 @@
     "@types/react-dom": "18.2.23",
     "@types/react-syntax-highlighter": "^15.5.11",
     "asciinema-player": "^3.7.1",
-    "autoprefixer": "10.4.18",
+    "autoprefixer": "10.4.19",
     "fast-xml-parser": "^4.3.5",
     "flowbite": "^2.3.0",
     "flowbite-react": "^0.9.0",