[npm] Bump @testing-library/user-event in /frontend

Bumps [@testing-library/user-event](https://github.com/testing-library/user-event) from 14.4.3 to 14.5.1.
- [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@v14.4.3...v14.5.1)

---
updated-dependencies:
- dependency-name: "@testing-library/user-event"
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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