Act On label as @react-native-bot (#45541)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/45541

This is another round of letting react-native-bot do the job that the
generic GitHub Action bot was doing.

Changelog:
[Internal] [Changed] - Act On label as react-native-bot

Reviewed By: cipolleschi

Differential Revision: D59959468

fbshipit-source-id: 8e0f7e2e90a40ed2aa265e637c8a809064e22747