Bump postcss from 8.4.45 to 8.4.47 in /frontend (#392)

Bumps [postcss](https://github.com/postcss/postcss) from 8.4.45 to
8.4.47.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/postcss/postcss/releases">postcss's
releases</a>.</em></p>
<blockquote>
<h2>8.4.47</h2>
<ul>
<li>Removed debug code.</li>
</ul>
<h2>8.4.46</h2>
<ul>
<li>Fixed <code>Cannot read properties of undefined (reading
'before')</code>.</li>
</ul>
</blockquote>
</details>
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/postcss/postcss/blob/main/CHANGELOG.md">postcss's
changelog</a>.</em></p>
<blockquote>
<h2>8.4.47</h2>
<ul>
<li>Removed debug code.</li>
</ul>
<h2>8.4.46</h2>
<ul>
<li>Fixed <code>Cannot read properties of undefined (reading
'before')</code>.</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/postcss/postcss/commit/5e6fd1302d2cc9a844ac99282b2b7745e4ac0ed3"><code>5e6fd13</code></a>
Release 8.4.47 version</li>
<li><a
href="https://github.com/postcss/postcss/commit/714bc10258bfa96be26bc201d218c67df09da82c"><code>714bc10</code></a>
Typo</li>
<li><a
href="https://github.com/postcss/postcss/commit/439d20e651098d9d16d31ede62df6f7916925e91"><code>439d20e</code></a>
Release 8.4.46 version</li>
<li><a
href="https://github.com/postcss/postcss/commit/b93582f68e1f4796618cfef3377a10198a5af800"><code>b93582f</code></a>
Update dependencies</li>
<li><a
href="https://github.com/postcss/postcss/commit/c51e46767d1b76d91ab3ba3b19e4b43b847755b8"><code>c51e467</code></a>
Fix error on inserting node without raws in some cases</li>
<li><a
href="https://github.com/postcss/postcss/commit/829ae47d6bf7a58a84a7633d9e4e45e2eb7a375a"><code>829ae47</code></a>
Update dependencies</li>
<li><a
href="https://github.com/postcss/postcss/commit/5aaaec2214117e353962f8d862a31ba0211e0f8b"><code>5aaaec2</code></a>
Update remaining workflow jobs to use latest version of actions (<a
href="https://redirect.github.com/postcss/postcss/issues/1968">#1968</a>)</li>
<li>See full diff in <a
href="https://github.com/postcss/postcss/compare/8.4.45...8.4.47">compare
view</a></li>
</ul>
</details>
<br />


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frontend/package.json

@@ -41,7 +41,7 @@
         "eslint-plugin-react-hooks": "^4.6.0",
         "eslint-plugin-react-refresh": "^0.4.5",
         "openapi-typescript-codegen": "^0.25.0",
-        "postcss": "^8.4.45",
+        "postcss": "^8.4.47",
         "prettier": "^3.1.0",
         "tailwindcss": "^3.3.2",
         "typescript": "^5.3.3",