build(deps-dev): bump @biomejs/biome from 2.3.0 to 2.3.1 in /frontend

Bumps [@biomejs/biome](https://github.com/biomejs/biome/tree/HEAD/packages/@biomejs/biome) from 2.3.0 to 2.3.1.
- [Release notes](https://github.com/biomejs/biome/releases)
- [Changelog](https://github.com/biomejs/biome/blob/main/packages/@biomejs/biome/CHANGELOG.md)
- [Commits](https://github.com/biomejs/biome/commits/@biomejs/biome@2.3.1/packages/@biomejs/biome)

---
updated-dependencies:
- dependency-name: "@biomejs/biome"
  dependency-version: 2.3.1
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

frontend/package.json

@@ -23,7 +23,7 @@
     "tailwindcss": "^4.1.16"
   },
   "devDependencies": {
-    "@biomejs/biome": "2.3.0",
+    "@biomejs/biome": "2.3.1",
     "@types/node": "^24.9.1",
     "@types/react": "^19.2.2",
     "@types/react-dom": "^19.2.2",