turn back the schedule

.github/workflows/check.yaml

@@ -2,7 +2,7 @@ name: Health
 # Check modules health on registry.coder.com
 on:
   schedule:
-    - cron: "0,15,30,45 * * * *" # Runs every 15 minutes
+    - cron: "*/13 * * * *" # Runs every 13th minute
   workflow_dispatch: # Allows manual triggering of the workflow if needed
 
 jobs: