Bump react-native in /react-native/ReactNativeFlipperExample

Bumps [react-native](https://github.com/facebook/react-native) from 0.63.4 to 0.64.0.
- [Release notes](https://github.com/facebook/react-native/releases)
- [Changelog](https://github.com/facebook/react-native/blob/master/Releases.md)
- [Commits](facebook/react-native@v0.63.4...v0.64.0)

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

react-native/ReactNativeFlipperExample/package.json

@@ -11,7 +11,7 @@
   },
   "dependencies": {
     "react": "^17.0.1",
-    "react-native": "^0.63.4",
+    "react-native": "^0.64.0",
     "react-native-flipper": "^0.80.0"
   },
   "devDependencies": {