chore: add links to the currently published example app

Author: satya164

.github/workflows/expo-preview.yml

@@ -50,4 +50,4 @@ jobs:
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         with:
-          msg: The Expo app for the example from this branch is ready!<br><br>[expo.io/${{ steps.expo.outputs.path }}](https://expo.io/${{ steps.expo.outputs.path }})<br><br><a href="https://exp.host/${{ steps.expo.outputs.path }}"><img src="https://api.qrserver.com/v1/create-qr-code/?size=200x200&data=exp://exp.host/${{ steps.expo.outputs.path }}" height="200px" width="200px"></a>.
+          msg: The Expo app for the example from this branch is ready!<br><br>[expo.io/${{ steps.expo.outputs.path }}](https://expo.io/${{ steps.expo.outputs.path }})<br><br><a href="https://exp.host/${{ steps.expo.outputs.path }}"><img src="https://api.qrserver.com/v1/create-qr-code/?size=400x400&data=exp://exp.host/${{ steps.expo.outputs.path }}" height="200px" width="200px"></a>.

example/README.md

@@ -5,3 +5,5 @@ If you want to run the example from the repo,
 - Clone the repository and run `yarn` in the project root
 - Run `yarn example start` to start the packager
 - Follow the instructions to open it with the [Expo app](https://expo.io/)
+
+You can also run the currently published [app on Expo](https://expo.io/@react-navigation/react-navigation-example) on your Android device or iOS simulator or the [web app](https://react-navigation-example.netlify.com/) in your browser.