Kolanky EV charger: fix units of Charging time setting.

Issue #2675

custom_components/tuya_local/devices/kolanky_evcharger.yaml

@@ -142,7 +142,7 @@ secondary_entities:
         type: integer
         optional: true
         name: sensor
-        unit: min
+        unit: h
         mapping:
           - scale: 10
   - entity: binary_sensor