Add scheduled cron job for daily execution in SharkPool workflow

Author: Sunwuyuan

.github/workflows/SharkPool.yml

@@ -8,7 +8,8 @@ on:
     branches: [ "main" ]
   pull_request:
     branches: [ "main" ]
-
+  schedule:
+    - cron: '0 0 * * 1'
 jobs:
   build:
     runs-on: ubuntu-latest