docs(app, expo): clarify note about handling previous Expo dev builds

Author: mikehardy

docs/index.md

@@ -80,7 +80,7 @@ The following is an example `app.json` to enable the React Native Firebase modul
 
 If you are compiling your app locally, run [`npx expo prebuild --clean`](https://docs.expo.dev/workflow/prebuild/) to generate the native project directories. Then, follow the local app compilation steps described in [Local app development](https://docs.expo.dev/guides/local-app-development/) guide in Expo docs. If you prefer using a build service, refer to [EAS Build](https://docs.expo.dev/build/setup/).
 
-Note that if you have already installed the `Expo Go` app (using something like `npx expo run` instead of doing the `--prebuild` local development steps...) then you must uninstall it first. The `Expo Go` app does not contain most non-Expo native modules like react-native-firebase, and you will see errors related to the native modules not being loaded if you try to use it.
+Note: if you have already installed an Expo development build (using something like `npx expo run` after doing the `--prebuild` local development steps...) before installing react-native-firebase, then you must uninstall it first as it will not contain the react-native-firebase native modules and you will get errors with `RNFBAppModule not found` etc. If so, uninstall the previous development build, do a clean build using `npx expo prebuild --clean`, and then attempt `npx expo run:<platform>` again.
 
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