Bump react-native-app-auth from 6.4.3 to 7.1.0 in /GraphRNSample

Bumps [react-native-app-auth](https://github.com/FormidableLabs/react-native-app-auth) from 6.4.3 to 7.1.0.
- [Release notes](https://github.com/FormidableLabs/react-native-app-auth/releases)
- [Changelog](https://github.com/FormidableLabs/react-native-app-auth/blob/main/CHANGELOG.md)
- [Commits](FormidableLabs/react-native-app-auth@v6.4.3...v7.1.0)

---
updated-dependencies:
- dependency-name: react-native-app-auth
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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Author: dependabot[bot]