Update main.yml

.github/workflows/main.yml

@@ -3,7 +3,7 @@ name: build
 on:
   schedule:
     # * is a special character in YAML so you have to quote this string
-    - cron:  '30 5 1 * *'
+    - cron:  '30 5 */30 * *'
   # Triggers the workflow on push event only for all branches
   push:
     branches: [ main, master, develop ]