Bump @testing-library/user-event from 12.1.6 to 12.1.7 in /ui

Bumps [@testing-library/user-event](https://github.com/testing-library/user-event) from 12.1.6 to 12.1.7.
- [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/v12.1.6...v12.1.7)

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

ui/package.json

@@ -29,7 +29,7 @@
   "devDependencies": {
     "@testing-library/jest-dom": "^5.11.4",
     "@testing-library/react": "^11.0.4",
-    "@testing-library/user-event": "^12.1.6",
+    "@testing-library/user-event": "^12.1.7",
     "prettier": "^2.1.2"
   },
   "scripts": {