chore(deps): bump @testing-library/react from 11.2.6 to 12.1.3

Bumps [@testing-library/react](https://github.com/testing-library/react-testing-library) from 11.2.6 to 12.1.3.
- [Release notes](https://github.com/testing-library/react-testing-library/releases)
- [Changelog](https://github.com/testing-library/react-testing-library/blob/main/CHANGELOG.md)
- [Commits](https://github.com/testing-library/react-testing-library/compare/v11.2.6...v12.1.3)

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

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

plugins/github-deployments/package.json

@@ -48,7 +48,7 @@
     "@backstage/dev-utils": "^0.2.25",
     "@backstage/test-utils": "^0.3.0",
     "@testing-library/jest-dom": "^5.10.1",
-    "@testing-library/react": "^11.2.5",
+    "@testing-library/react": "^12.1.3",
     "@testing-library/user-event": "^13.1.8",
     "@types/jest": "^26.0.7",
     "@types/node": "^14.14.32",