Update README to specify run script phase change

README.md

@@ -39,7 +39,18 @@ Download the [Crashlytics
 SDK](https://fabric.io/kits/ios/crashlytics/manual-install) and place the two
 frameworks in a directory called `Crashlytics` in the `ios` directory. You may
 want to add this directory to your `.gitignore` as they take up a decent amount
-of space and will slow down Git. Then do the following:
+of space and will slow down Git.
+
+You will also need to modify the Run Script Phase that you likely added to Build
+Phases so that it points to the correct location for the Fabric framework. If
+you placed the framework directly under `ios/Crashlytics` as specified above,t
+the contents of the script will then be:
+
+```
+"$(SRCROOT)/Crashlytics/Fabric.framework/run" API_KEY API_SECRET
+```
+
+Then do the following:
 
 - Open your project in Xcode
 - Run ```open node_modules/react-native-fabric/ios```