chore(deps): bump react-dropzone from 14.3.8 to 15.0.0 in /frontend

Bumps [react-dropzone](https://github.com/react-dropzone/react-dropzone) from 14.3.8 to 15.0.0.
- [Release notes](https://github.com/react-dropzone/react-dropzone/releases)
- [Commits](react-dropzone/react-dropzone@v14.3.8...v15.0.0)

---
updated-dependencies:
- dependency-name: react-dropzone
  dependency-version: 15.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

frontend/package-lock.json

@@ -39,7 +39,7 @@
     "react": "^19.1.0",
     "react-chartjs-2": "^5.3.0",
     "react-dom": "^19.2.5",
-    "react-dropzone": "^14.3.8",
+    "react-dropzone": "^15.0.0",
     "react-google-drive-picker": "^1.2.2",
     "react-i18next": "^17.0.2",
     "react-markdown": "^9.0.1",