ci: change gemini scheduled triage to run daily

Author: DeanChensj

.github/workflows/gemini-scheduled-triage.yml

@@ -2,7 +2,7 @@ name: '📋 Gemini Scheduled Issue Triage'
 
 on:
   schedule:
-    - cron: '0 * * * *' # Runs every hour
+    - cron: '0 0 * * *' # Runs once a day
   pull_request:
     branches:
       - 'main'