chore: Disable weekly scheduled builds

- Comment out schedule trigger (every Monday at 2 AM)
- Keep manual trigger (workflow_dispatch) available
- Keep push and PR triggers active

Author: wrjade

.github/workflows/build.yml

@@ -5,8 +5,8 @@ on:
     branches: [ main ]
   pull_request:
     branches: [ main ]
-  schedule:
-    - cron: '0 2 * * 1'  # Weekly on Monday at 2 AM
+  # schedule:
+  #   - cron: '0 2 * * 1'  # Weekly on Monday at 2 AM (disabled)
   workflow_dispatch:
     inputs:
       push_images: