release-notes-preview gets broken by the <scope> portion of a commit header

[bradennapier]

Tried 1.6.2 and it didn't seem to work I had a line (feat(play): test) which should have generated notes for that and it didnt post anything to the PR.

processing line: ea19f82 feat(play): test
adding "test (ea19f82)" to others

The actual beta release notes were created, however:

[Shesekino]

Thanks for the details :)
When I wrote the code here, I completely neglected the part of the commit header that deals with the "scope":
<type>(<scope>): <subject>
Because I never used it.
Now I realise it's used and should be supported.