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

Bumps [@testing-library/react](https://github.com/testing-library/react-testing-library) from 16.2.0 to 16.3.0.
- [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@v16.2.0...v16.3.0)

---
updated-dependencies:
- dependency-name: "@testing-library/react"
  dependency-version: 16.3.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

frontend/package-lock.json

@@ -56,7 +56,7 @@
     "@tanstack/react-router-devtools": "^1.114.34",
     "@tanstack/router-plugin": "^1.114.34",
     "@testing-library/jest-dom": "^6.6.3",
-    "@testing-library/react": "^16.2.0",
+    "@testing-library/react": "^16.3.0",
     "@testing-library/user-event": "^14.6.1",
     "@types/node": "^22.13.17",
     "@types/react": "19.1.0",