Summary:
Added description for rejectResponderTermination prop for the TextInput, which seemed to have been deleted.
Descriptions are taken from https://github.com/facebook/react-native/pull/16755/files
## Changelog
[Internal] [Added] - Add description for rejectResponderTermination prop for TextInput
Pull Request resolved: https://github.com/facebook/react-native/pull/28001
Test Plan: This PR only changes comment, which has no effect on actual function.
Differential Revision: D19820886
Pulled By: TheSavior
fbshipit-source-id: 5cbaafcbae0bdbf6932ef9c7c0c1a75cd6d8794e