Bump autoprefixer from 10.4.21 to 10.5.0 in /frontend

Bumps [autoprefixer](https://github.com/postcss/autoprefixer) from 10.4.21 to 10.5.0.
- [Release notes](https://github.com/postcss/autoprefixer/releases)
- [Changelog](https://github.com/postcss/autoprefixer/blob/main/CHANGELOG.md)
- [Commits](https://github.com/postcss/autoprefixer/compare/10.4.21...10.5.0)

---
updated-dependencies:
- dependency-name: autoprefixer
  dependency-version: 10.5.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

frontend/package.json

@@ -77,7 +77,7 @@
     "@types/node": "^22",
     "@types/react": "^19",
     "@types/react-dom": "^19",
-    "autoprefixer": "^10.4.20",
+    "autoprefixer": "^10.5.0",
     "postcss": "^8.5",
     "tailwindcss": "^3.4.17",
     "typescript": "^5"