Fix bug for zhimi.fan.za5 resulting in user ack timeout (#1348)

* Fix bug for zhimi.fan.za5 resulting in user ack timeout

* Update miio/integrations/fan/zhimi/zhimi_miot.py

Co-authored-by: Teemu R. <tpr@iki.fi>

Co-authored-by: Teemu R. <tpr@iki.fi>

Author: saxel

miio/integrations/fan/zhimi/zhimi_miot.py

@@ -169,7 +169,7 @@ def temperature(self) -> Any:
 
 
 class FanZA5(MiotDevice):
-    mapping = MIOT_MAPPING
+    _mappings = MIOT_MAPPING
     _supported_models = list(MIOT_MAPPING.keys())
 
     @command(