Bump @testing-library/user-event in /ui-super-heroes/src/main/webui

Bumps [@testing-library/user-event](https://github.com/testing-library/user-event) from 14.5.2 to 14.6.0.
- [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@v14.5.2...v14.6)

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

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

ui-super-heroes/src/main/webui/package.json

@@ -45,7 +45,7 @@
     "@testing-library/dom": "^10.4.0",
     "@testing-library/jest-dom": "^6.6.3",
     "@testing-library/react": "^16.2.0",
-    "@testing-library/user-event": "^14.5.2"
+    "@testing-library/user-event": "^14.6.0"
   },
   "jest": {
     "transformIgnorePatterns": [