chore(deps-dev): bump @testing-library/react-native

Bumps [@testing-library/react-native](https://github.com/callstack/react-native-testing-library) from 12.8.1 to 12.9.0.
- [Release notes](https://github.com/callstack/react-native-testing-library/releases)
- [Changelog](https://github.com/callstack/react-native-testing-library/blob/main/.release-it.json)
- [Commits](callstack/react-native-testing-library@v12.8.1...v12.9.0)

---
updated-dependencies:
- dependency-name: "@testing-library/react-native"
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>