Bump Example and FabricExample to 0.73.4 (#5680)

## Summary

This PR bumps react-native in Example and FabricExample from 0.73.3 to
0.73.4.


https://react-native-community.github.io/upgrade-helper/?from=0.73.3&to=0.73.4

## Test plan

Build and launch Example and FabricExample apps on Android and iOS.

---------

Co-authored-by: Tomasz Żelawski <tomasz.zelawski@swmansion.com>
Co-authored-by: Krzysztof Piaskowy <krzysztof.piaskowy@swmansion.com>

.github/workflows/ios-build.yml

@@ -75,7 +75,9 @@ jobs:
 
       - name: Install Pods
         working-directory: ${{ matrix.working-directory }}/ios
-        run: pod install
+        run: |
+          bundler install
+          bundler exec pod install
 
       - name: Restore build artifacts from cache
         uses: actions/cache@v3