check GH URLs in validate script, update data to avoid redirects

[Simek]

📝 Why & how

Spotted that search results does not provide a result for an existing data when searching by GitHub URL. After debugging, I have found the root cause which was the old entry in libraries JSON, which now uses redirect to move users to the up-to-date repository.

This PR updates the libraries:check script to validate GitHub URL in libraries data, so we can detect the redirects and update entries accordingly, which has also been done within this changeset.

I have also added one library mention in the altered repo README:

• https://github.com/Hector-Zhuang/expo-native-wechat

✅ Checklist

• Added library to react-native-libraries.json
• Updated library in react-native-libraries.json
• Documented how you found or replicated the issue.
• Explained how you fixed the issue or built the feature.