build(deps): bump @testing-library/user-event in /web

Bumps [@testing-library/user-event](https://github.com/testing-library/user-event) from 12.3.0 to 12.4.0.
- [Release notes](https://github.com/testing-library/user-event/releases)
- [Changelog](https://github.com/testing-library/user-event/blob/master/CHANGELOG.md)
- [Commits](https://github.com/testing-library/user-event/compare/v12.3.0...v12.4.0)

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

web/package.json

@@ -5,7 +5,7 @@
   "dependencies": {
     "@testing-library/jest-dom": "^5.11.6",
     "@testing-library/react": "^11.2.2",
-    "@testing-library/user-event": "^12.3.0",
+    "@testing-library/user-event": "^12.4.0",
     "@types/jest": "^26.0.16",
     "@types/node": "^14.14.10",
     "@types/react": "^17.0.0",