`UX` is the officially supported prefix per https://meta.discourse.org/t/19392, but sometimes `UI` is used instead. We should still include those commits.
Limit git log output to the first line of the commit message
when generating the list of commits in a release. Some commit messages
are including the names of all commits that were squashed, resulting
in duplicate and confusing lines in the release notes.
This reduces chances of errors where consumers of strings mutate inputs
and reduces memory usage of the app.
Test suite passes now, but there may be some stuff left, so we will run
a few sites on a branch prior to merging
