build(deps-dev): bump autoprefixer from 10.5.0 to 10.5.4 in /frontend

Bumps [autoprefixer](https://github.com/postcss/autoprefixer) from 10.5.0 to 10.5.4.
- [Release notes](https://github.com/postcss/autoprefixer/releases)
- [Changelog](https://github.com/postcss/autoprefixer/blob/main/CHANGELOG.md)
- [Commits](postcss/autoprefixer@10.5.0...10.5.4)

---
updated-dependencies:
- dependency-name: autoprefixer
  dependency-version: 10.5.4
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

frontend/package.json

@@ -72,7 +72,7 @@
     "@types/node": "^25",
     "@types/react": "^19",
     "@types/react-dom": "^19",
-    "autoprefixer": "^10.5.0",
+    "autoprefixer": "^10.5.4",
     "postcss": "^8.5",
     "tailwindcss": "^3.4.17",
     "typescript": "^5"