chore(deps): bump @testing-library/react in /frontend

Bumps [@testing-library/react](https://github.com/testing-library/react-testing-library) from 14.0.0 to 15.0.6.
- [Release notes](https://github.com/testing-library/react-testing-library/releases)
- [Changelog](https://github.com/testing-library/react-testing-library/blob/main/CHANGELOG.md)
- [Commits](testing-library/react-testing-library@v14.0.0...v15.0.6)

---
updated-dependencies:
- dependency-name: "@testing-library/react"
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

frontend/package-lock.json

@@ -9,7 +9,7 @@
     "@fortawesome/react-fontawesome": "^0.2.0",
     "@reduxjs/toolkit": "^2.2.1",
     "@testing-library/jest-dom": "^6.4.2",
-    "@testing-library/react": "^14.0.0",
+    "@testing-library/react": "^15.0.6",
     "@testing-library/user-event": "^14.5.2",
     "@types/react": "^18.3.1",
     "axios": "^1.6.8",