fix: change log to debug (#389)

Author: Yhlong00

runpod/serverless/modules/rp_scale.py

@@ -144,7 +144,7 @@ def kill_worker(self):
         """
         Whether to kill the worker.
         """
-        log.info("Kill worker.")
+        log.debug("Kill worker.")
         self._shutdown_event.set()
 
     def current_occupancy(self) -> int: