Update daily-check-in.yml to run every 12 hours

Author: doveppp

.github/workflows/daily-check-in.yml

@@ -2,7 +2,7 @@ name: Daily Check-in
 
 on:
   schedule:
-    - cron: '0 1 * * *'  # 每天1点 UTC 时间执行
+    - cron: '0 */12 * * *'  # 每12小时执行一次
   workflow_dispatch:
 
 jobs: