Bump @react-navigation/stack from 6.3.17 to 6.3.18 in /GraphRNSample

Bumps [@react-navigation/stack](https://github.com/react-navigation/react-navigation/tree/HEAD/packages/stack) from 6.3.17 to 6.3.18.
- [Release notes](https://github.com/react-navigation/react-navigation/releases)
- [Changelog](https://github.com/react-navigation/react-navigation/blob/@react-navigation/[email protected]/packages/stack/CHANGELOG.md)
- [Commits](https://github.com/react-navigation/react-navigation/commits/@react-navigation/[email protected]/packages/stack)

---
updated-dependencies:
- dependency-name: "@react-navigation/stack"
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

GraphRNSample/package-lock.json

@@ -15,7 +15,7 @@
     "@react-native-community/datetimepicker": "^7.5.0",
     "@react-navigation/drawer": "^6.6.2",
     "@react-navigation/native": "^6.1.7",
-    "@react-navigation/stack": "^6.3.17",
+    "@react-navigation/stack": "^6.3.18",
     "date-fns": "^2.30.0",
     "date-fns-tz": "^2.0.0",
     "react": "18.2.0",