Update classification of Fixed (#48561)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/48561

The changelog for 0.77 needs some love as there are some entry that are incorrectly classified.

In this diff I took care of fixing the `Fixed` entries.

We need to go through all the other classes of entries.

## Changelog:
[Internal] - Refine 0.77 changelog

Reviewed By: cortinico

Differential Revision: D67972217

fbshipit-source-id: 343dd5a4e8a6cd6d6806447063594ba466db3b1e