Tediton K7: rename request_unlock to unlock_request.

This was the original tuya naming, and there is no corresponding
approval dp so request_unlock cannot work as designed.
Issue #1391

custom_components/tuya_local/devices/tediton_k7_doorlock.yaml

@@ -48,7 +48,7 @@ primary_entity:
         - value: false
     - id: 9
       type: integer
-      name: request_unlock
+      name: unlock_request
     - id: 15
       type: integer
       name: unlock_app