Update README.md (#794)

If you want to run multiple builds on same device, you also have to change Product Bundle Identifier for builds. Otherwise builds are overwritten on device.

Author: MichalRemis

README.md

@@ -386,7 +386,7 @@ And that's it! Now when you run or build your app, your staging builds will auto
 
 *Note: If you encounter the error message `ld: library not found for ...`, please consult [this issue](https://github.com/Microsoft/react-native-code-push/issues/426) for a possible solution.*
 
-Additionally, if you want to give them seperate names and/or icons, you can modify the `Product Name` and `Asset Catalog App Icon Set Name` build settings, which will allow your staging builds to be distinguishable from release builds when installed on the same device.
+Additionally, if you want to give them seperate names and/or icons, you can modify the `Product Bundle Identifier`, `Product Name` and `Asset Catalog App Icon Set Name` build settings, which will allow your staging builds to be distinguishable from release builds when installed on the same device.
 
 ### Dynamic Deployment Assignment