Bump prettier from 2.1.1 to 2.1.2 in /ui

Bumps [prettier](https://github.com/prettier/prettier) from 2.1.1 to 2.1.2.
- [Release notes](https://github.com/prettier/prettier/releases)
- [Changelog](https://github.com/prettier/prettier/blob/master/CHANGELOG.md)
- [Commits](https://github.com/prettier/prettier/compare/2.1.1...2.1.2)

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

ui/package.json

@@ -29,7 +29,7 @@
     "@testing-library/jest-dom": "^5.11.4",
     "@testing-library/react": "^11.0.4",
     "@testing-library/user-event": "^12.1.5",
-    "prettier": "^2.1.1"
+    "prettier": "^2.1.2"
   },
   "scripts": {
     "start": "react-scripts start",