build(deps-dev): bump @testing-library/user-event in /react-app

Bumps [@testing-library/user-event](https://github.com/testing-library/user-event) from 14.4.2 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@v14.4.2...v14.5.1)

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

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