Bump @react-native-async-storage/async-storage in /GraphRNSample

Bumps [@react-native-async-storage/async-storage](https://github.com/react-native-async-storage/async-storage/tree/HEAD/packages/default-storage-backend) from 1.19.3 to 1.21.0.
- [Release notes](https://github.com/react-native-async-storage/async-storage/releases)
- [Commits](https://github.com/react-native-async-storage/async-storage/commits/v1.21.0/packages/default-storage-backend)

---
updated-dependencies:
- dependency-name: "@react-native-async-storage/async-storage"
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

GraphRNSample/package-lock.json

@@ -11,7 +11,7 @@
   },
   "dependencies": {
     "@microsoft/microsoft-graph-client": "^3.0.5",
-    "@react-native-async-storage/async-storage": "^1.19.3",
+    "@react-native-async-storage/async-storage": "^1.21.0",
     "@react-native-community/datetimepicker": "^7.5.0",
     "@react-navigation/drawer": "^6.6.2",
     "@react-navigation/native": "^6.1.8",