Update main.yml

don't run if it contains the word Update

.github/workflows/main.yml

@@ -22,6 +22,7 @@ jobs:
     name: Publish to GitHub
     runs-on: ubuntu-latest
     needs: build
+    if: ${{ !contains(github.event.head_commit.message, 'Update') }}
 
     steps:
     - name: Checkout