chore: update url of warning message from deprecated imports (#28452)

Summary:
Some of the repository name of Lean Core(https://github.com/facebook/react-native/issues/23313) libraries has been renamed.
This PR updates the warning message to display the updated url.

## Changelog

[General] [Changed] - Update warning message of deprecated imports
Pull Request resolved: https://github.com/facebook/react-native/pull/28452

Test Plan: updated URL can be accessed.

Reviewed By: cpojer

Differential Revision: D20745184

Pulled By: TheSavior

fbshipit-source-id: 2c3ed6a000b45022ca6c4862305aa567c4d18b2e