Modify cron schedule for iCourse Check workflow

Updated cron schedule to include additional times.

Author: LeafCreeper

.github/workflows/check.yml

@@ -2,8 +2,9 @@ name: iCourse Check
 
 on:
   schedule:
-    # Every day at 22:00 UTC+8 (14:00 UTC)
-    - cron: "0 14 * * *"
+    # Every day at 14:00 and 20:00 BTC (UTC + 8)
+    - cron: "0 6 * * *"
+    - cron: "0 12 * * *"
   workflow_dispatch:
 
 permissions: