chore: set schedule of lock closed issue (#4285)

Author: Shinigami92

.github/workflows/lock-closed-issues.yml

@@ -2,7 +2,7 @@ name: Lock Closed Issues
 
 on:
   schedule:
-    - cron: "*/10 * * * *"
+    - cron: "0 0 */7 * *"
 
 permissions:
   issues: write