🐛 rename head -> heads

Author: bitbrain

.github/workflows/build-branch.yml

@@ -24,7 +24,7 @@ jobs:
       run: bundle exec rake
   # release the tag to rubygems
   release:
-    if: github.ref == 'refs/head/main'
+    if: github.ref == 'refs/heads/main'
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v1