build(deps-dev): bump postcss from 8.4.45 to 8.4.47 (#1735)

Bumps [postcss](https://github.com/postcss/postcss) from 8.4.45 to 8.4.47.
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](postcss/postcss@8.4.45...8.4.47)

---
updated-dependencies:
- dependency-name: postcss
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

packages/frontend/package.json

@@ -33,7 +33,7 @@
     "@types/humanize-duration": "^3.27.4",
     "@typescript-eslint/eslint-plugin": "8.5.0",
     "jsdom": "^25.0.0",
-    "postcss": "^8.4.45",
+    "postcss": "^8.4.47",
     "postcss-load-config": "^6.0.1",
     "svelte": "5.0.0-next.246",
     "svelte-fa": "^4.0.2",