Update ios credentials setup instructions

[romanakash]

Description

Update documentation for adding ios credentials

Related issues

Release Summary

Checklist

• I read the Contributor Guide and followed the process outlined there for submitting PRs.
  • Yes
• My change supports the following platforms;
  • Android
  • iOS
• My change includes tests;
  • e2e tests added or updated in packages/\*\*/e2e
  • jest tests added or updated in packages/\*\*/__tests__
• I have updated TypeScript types that are affected by my change.
• This is a breaking change;
  • Yes
  • No

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Name	Status	Preview	Comments	Updated (UTC)
react-native-firebase	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jan 25, 2025 0:32am

[CLAassistant]

All committers have signed the CLA.

[enchorb]

Is it possible to also update the setup guide for the messaging module, https://rnfirebase.io/messaging/usage, more specifcally the section To inject a isHeadless prop into your app, please update your AppDelegate.m file as instructed below:

[wneel]

Fixed my build on react-native@0.77.1 (iOS), thanks

[yenshirak]

Suggested change

	#import Firebase
	import Firebase