Update publish.yml

Author: erossignon

.github/workflows/publish.yml

@@ -2,13 +2,11 @@ name: publish
 
 # Controls when the workflow will run
 on:
-  push:
-    branches: [master]
   workflow_dispatch:
 
 jobs:
   publish:
-    if: github.event_name == 'workflow_dispatch'
+    if: github.ref == 'refs/heads/master
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code