Disable scheduled trigger in jp-loadingbg.yml

Comment out the scheduled cron job for workflow.

Author: stephensund

.github/workflows/jp-loadingbg.yml

@@ -4,8 +4,8 @@ permissions:
   contents: write   # ✅ 必须，否则 Release 会失败
 
 on:
-  schedule:
-    - cron: "0 3 * * *"   # UTC 03:00 (≈ JST 12:00)
+#  schedule:
+#    - cron: "0 3 * * *"   # UTC 03:00 (≈ JST 12:00)
   workflow_dispatch:
 
 jobs: