Bump form-data from 4.0.5 to 4.0.6 in /frontend

Bumps [form-data](https://github.com/form-data/form-data) from 4.0.5 to 4.0.6.
- [Release notes](https://github.com/form-data/form-data/releases)
- [Changelog](https://github.com/form-data/form-data/blob/master/CHANGELOG.md)
- [Commits](form-data/form-data@v4.0.5...v4.0.6)

---
updated-dependencies:
- dependency-name: form-data
  dependency-version: 4.0.6
  dependency-type: direct:production
...

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

Author: dependabot[bot]

frontend/package.json

@@ -35,7 +35,7 @@
     "axios": "1.16.0",
     "class-variance-authority": "^0.7.1",
     "clsx": "^2.1.1",
-    "form-data": "4.0.5",
+    "form-data": "4.0.6",
     "lucide-react": "^0.563.0",
     "next-themes": "^0.4.6",
     "react": "^19.1.1",