chore(deps-dev): bump @testing-library/user-event in /frontend (#1317)

Bumps [@testing-library/user-event](https://github.com/testing-library/user-event) from 14.6.1 to 14.6.3.
- [Release notes](https://github.com/testing-library/user-event/releases)
- [Changelog](https://github.com/testing-library/user-event/blob/main/CHANGELOG.md)
- [Commits](testing-library/user-event@v14.6.1...v14.6.3)

---
updated-dependencies:
- dependency-name: "@testing-library/user-event"
  dependency-version: 14.6.3
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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Author: dependabot[bot]

frontend/package-lock.json

@@ -48,7 +48,7 @@
     "@tailwindcss/postcss": "^4",
     "@testing-library/jest-dom": "^6.6.3",
     "@testing-library/react": "^16.3.0",
-    "@testing-library/user-event": "^14.6.1",
+    "@testing-library/user-event": "^14.6.3",
     "@types/node": "^20",
     "@types/react": "^19",
     "@types/react-dom": "^19",