Update minimal-usage.yml with cron job

Author: ocaisa

.github/workflows/minimal-usage.yml

@@ -1,5 +1,8 @@
 name: ubuntu-minimal_usage
 on:
+  schedule:
+    - cron: '0 0 * * *'  # Runs once a day at midnight UTC
+  workflow_dispatch: # Allows manual triggering
   push:
     branches:
       - main