Summary:
Fixed a link in a comment that lead to dead link
whatwg-url changed the source directory from `lib` to `src`
## Changelog
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[INTERNAL] [FIXED] - fix dead link in a comment
Pull Request resolved: https://github.com/facebook/react-native/pull/31902
Test Plan: - [ ] Changed URL opens properly
Reviewed By: charlesbdudley
Differential Revision: D29915170
Pulled By: lunaleaps
fbshipit-source-id: 00b69db82f51d16cf887cd4540a159132ad7d771
b4b8b73a9b