Allow release job to run on tags

Similar problem with running on tags, it wasn't running the actual
release job.

Part of #539

Author: TimvdLippe

.github/workflows/ci.yml

@@ -79,7 +79,7 @@ jobs:
     needs: [build] # build job must pass before we can release
 
     if: github.event_name == 'push'
-        && (github.ref == 'refs/heads/main' || startsWith(github.ref, 'refs/tags/5.'))
+        && startsWith(github.ref, 'refs/tags/v')
         && github.repository == 'mockito/mockito-kotlin'
         && !contains(toJSON(github.event.commits.*.message), '[skip release]')