Update DB_utils.py

DB_utils.py

@@ -82,7 +82,7 @@ def find_unused_wells():
     if len(empty_wells) == 1:
         maintenance_type =  "wellplate_maintenance"
         if check_maintenance_status(maintenance_type) == 0:
-            asyncio.run(trigger_maintenance_request_async(maintenance_type))
+            asyncio.run(trigger_maintenance_request(maintenance_type))
             set_maintenance_status(maintenance_type,1)
         else:
             print("[DEBUG] a maintenance request has been sent")