build(deps): bump @testing-library/user-event from 13.5.0 to 14.0.0

Bumps [@testing-library/user-event](https://github.com/testing-library/user-event) from 13.5.0 to 14.0.0.
- [Release notes](https://github.com/testing-library/user-event/releases)
- [Changelog](https://github.com/testing-library/user-event/blob/main/CHANGELOG.md)
- [Commits](https://github.com/testing-library/user-event/compare/v13.5.0...v14.0.0)

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

Signed-off-by: dependabot[bot] <support@github.com>
Signed-off-by: Johan Haals <johan.haals@gmail.com>

plugins/github-deployments/package.json

@@ -49,7 +49,7 @@
     "@backstage/test-utils": "^1.0.1-next.1",
     "@testing-library/jest-dom": "^5.10.1",
     "@testing-library/react": "^12.1.3",
-    "@testing-library/user-event": "^13.1.8",
+    "@testing-library/user-event": "^14.0.0",
     "@types/jest": "^26.0.7",
     "@types/node": "^14.14.32",
     "cross-fetch": "^3.1.5",