Loosen up restrictions for internal changelogs (#28486)
Loosen up restrictions for internal changelogs (#28486)

Summary:
Do not nag on PRs that contain internal changelogs (meaning, the change doesn't need to be called out in release notes).

## Changelog

[Internal] - This should be acceptable.
Pull Request resolved: https://github.com/facebook/react-native/pull/28486

Test Plan: See PR.

Reviewed By: cpojer

Differential Revision: D20817454

Pulled By: hramos

fbshipit-source-id: a7082c4db05ec53ad27349db7e5bce2cfffd6930

myntra/react-native,hammerandchisel/react-native,exponentjs/react-native,exponent/react-native,arthuralee/react-native,exponent/react-native,facebook/react-native,janicduplessis/react-native,myntra/react-native,facebook/react-native,pandiaraj44/react-native,javache/react-native,javache/react-native,exponent/react-native,hoangpham95/react-native,hoangpham95/react-native,facebook/react-native,janicduplessis/react-native,exponent/react-native,myntra/react-native,exponentjs/react-native,javache/react-native,javache/react-native,myntra/react-native,janicduplessis/react-native,exponent/react-native,pandiaraj44/react-native,hammerandchisel/react-native,janicduplessis/react-native,exponent/react-native,hoangpham95/react-native,hammerandchisel/react-native,exponentjs/react-native,exponentjs/react-native,exponentjs/react-native,exponentjs/react-native,myntra/react-native,pandiaraj44/react-native,janicduplessis/react-native,pandiaraj44/react-native,pandiaraj44/react-native,pandiaraj44/react-native,javache/react-native,arthuralee/react-native,hammerandchisel/react-native,hoangpham95/react-native,hammerandchisel/react-native,javache/react-native,javache/react-native,janicduplessis/react-native,hammerandchisel/react-native,arthuralee/react-native,arthuralee/react-native,facebook/react-native,javache/react-native,facebook/react-native,myntra/react-native,pandiaraj44/react-native,facebook/react-native,hammerandchisel/react-native,hoangpham95/react-native,hoangpham95/react-native,facebook/react-native,hammerandchisel/react-native,hoangpham95/react-native,janicduplessis/react-native,exponentjs/react-native,exponent/react-native,myntra/react-native,myntra/react-native,exponent/react-native,javache/react-native,arthuralee/react-native,pandiaraj44/react-native,janicduplessis/react-native,myntra/react-native,hoangpham95/react-native,exponentjs/react-native,facebook/react-native,facebook/react-native