docs(firebase_auth): Update github_sign_in dependency in "auth/social.mdx" documentation. (#8260)

Author: AliAkberAakash

docs/auth/social.mdx

@@ -421,7 +421,7 @@ Install the [`github_sign_in`](https://pub.dev/packages/github_sign_in) plugin:
 
 ```yaml title="pubspec.yaml"
 dependencies:
-  github_sign_in: ^0.0.1
+  github_sign_in: ^0.0.5-dev.4
 ```
 
 You will need to populate the `GitHubSignIn` instance with your GitHub Client ID, GitHub Client Secret and also a Redirect URL (Firebase callback url).