Update python-app.yml

Author: tugraskan

.github/workflows/python-app.yml

@@ -2,9 +2,9 @@ name: Python application
 
 on:
   push:
-    branches: [ master ]
+    branches: [ main ]
   pull_request:
-    branches: [ master ]
+    branches: [ main ]
 
 permissions:
   contents: write