⬆ Bump @biomejs/biome from 1.6.1 to 1.9.4 in /frontend (#1582)

Bumps [@biomejs/biome](https://github.com/biomejs/biome/tree/HEAD/packages/@biomejs/biome) from 1.6.1 to 1.9.4.
- [Release notes](https://github.com/biomejs/biome/releases)
- [Changelog](https://github.com/biomejs/biome/blob/main/CHANGELOG_v1.md)
- [Commits](https://github.com/biomejs/biome/commits/cli/v1.9.4/packages/@biomejs/biome)

---
updated-dependencies:
- dependency-name: "@biomejs/biome"
  dependency-version: 1.9.4
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

frontend/package.json

@@ -26,7 +26,7 @@
     "react-icons": "^5.4.0"
   },
   "devDependencies": {
-    "@biomejs/biome": "1.6.1",
+    "@biomejs/biome": "1.9.4",
     "@hey-api/openapi-ts": "^0.57.0",
     "@playwright/test": "^1.45.2",
     "@tanstack/router-devtools": "1.19.1",