Summary:
The source for the React Native documentation and website is hosted on a separate repository, [**facebook/react-native-website**][repo-website]. [LICENSE-docs](https://github.com/facebook/react-native/blob/main/LICENSE-docs) had been removed, so it should be replaced by [**this link**](https://github.com/facebook/react-native-website/blob/main/LICENSE-docs). Of course we could delete it directly.

## Changelog:
[Internal] [Fixed] - Update link

Pull Request resolved: https://github.com/facebook/react-native/pull/50868

Test Plan: nothing

Reviewed By: cipolleschi

Differential Revision: D73512121

Pulled By: cortinico

fbshipit-source-id: dba43626eb2a65a73ca2f46a830488e1437c3a1f