Bump postcss from 8.4.44 to 8.4.45 in /frontend (#390)

Bumps [postcss](https://github.com/postcss/postcss) from 8.4.44 to
8.4.45.
<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>8.4.45</h2>
<ul>
<li>Removed unnecessary fix which could lead to infinite loop.</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>8.4.45</h2>
<ul>
<li>Removed unnecessary fix which could lead to infinite loop.</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/postcss/postcss/commit/448c4f34d6540181e8ceb499dd9ffe4518356d1c"><code>448c4f3</code></a>
Release 8.4.45 version</li>
<li><a
href="https://github.com/postcss/postcss/commit/1c77d2e33396a314dce558d63ffdbcae7e5c5014"><code>1c77d2e</code></a>
Update unnecessary check</li>
<li><a
href="https://github.com/postcss/postcss/commit/f38b329323b050fde56c2760b6ffe9e3786a23dc"><code>f38b329</code></a>
Try to fix CI</li>
<li>See full diff in <a
href="https://github.com/postcss/postcss/compare/8.4.44...8.4.45">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": "^8.4.44",
+        "postcss": "^8.4.45",
         "prettier": "^3.1.0",
         "tailwindcss": "^3.3.2",
         "typescript": "^5.3.3",