Only publish tags

Author: TimvdLippe

.github/workflows/ci.yml

@@ -77,7 +77,7 @@ jobs:
     needs: [verify, build] # build job must pass before we can release
 
     if: github.event_name == 'push'
-        && (github.ref == 'refs/heads/master' || startsWith(github.ref, 'refs/tags/v'))
+        && startsWith(github.ref, 'refs/tags/v')
         && github.repository == 'mockito/mockito-testng'
         && !contains(toJSON(github.event.commits.*.message), '[skip release]')