Update deploy.yml

Author: BenjaminHoegh

.github/workflows/deploy.yml

@@ -38,6 +38,8 @@ jobs:
     name: Deploy to GitHub Pages
     needs: build
 
+    if: github.event_name == 'push' && github.ref == 'refs/heads/docs'
+
     # Grant GITHUB_TOKEN the permissions required to make a Pages deployment
     permissions:
       pages: write # to deploy to Pages
@@ -49,6 +51,7 @@ jobs:
       url: ${{ steps.deployment.outputs.page_url }}
 
     runs-on: ubuntu-latest
+    
     steps:
       - name: Deploy to GitHub Pages
         id: deployment