Initial setup missing mention of configuration of 'Sign in with Apple for Email Communication'

When trying to follow the [initial setup guide](https://github.com/invertase/react-native-apple-authentication/blob/main/docs/INITIAL_SETUP.md), firstly, all the screenshots are now out of date with the new Apple Developer interface and secondly and more importantly, trying to edit the Identifier to toggle on `Sign In with Apple` will fail with the error:
**Adding or removing any capabilities will invalidate any provisioning profiles that include this App ID and they must be regenerated for future use.**

in such a way that the Save button never works correctly.

This can be fixed by navigating to the `Services` item in the menu and filling out the **Sign in with Apple for Email Communication** form:

Suggest that the initial setup guide be updated with the latest approach.