Adds a Changelog Quality Checklist to the release skill covering:
- Diffing code between tags (not just reading commit messages)
- Tracing every 'Fixed' entry to its origin commit
- The 'would a user on the previous version notice this?' test
- A worked example of the intra-release bug pattern
Removes the 'expanded emoji picker background' fix from the v2.9.0
changelog -- that bug was both introduced and fixed within the 2.9.0
release window, so no shipped user ever saw it.
Alex Gleason
6bca0922f1
