Fix CI trigger condition

Author: Kobzol

.github/workflows/main.yml

@@ -44,7 +44,7 @@ jobs:
 
   deploy:
     needs: [ build ]
-    if: github.action == 'push' && github.ref == 'refs/heads/master'
+    if: github.event_name == 'push' && github.ref == 'refs/heads/master'
     environment:
       name: github-pages
     permissions: