Enable push trigger for main branch in start exercise workflow

Author: lilblueyes

.github/workflows/0-start-exercise.yml

@@ -2,9 +2,9 @@ name: Step 0 # Start Exercise
 
 on:
   workflow_dispatch:
-  # NOTE: Enable this if your repo is a template and you want auto-start on first push to main
-  # push:
-  #   branches: [ main ]
+  push:
+    branches: [ main ]
+
 
 permissions:
   contents: write