Vevor EV charger: fix phase A power sensor

Comment on PR #2280

custom_components/tuya_local/devices/vevor_ev_charger.yaml

@@ -76,7 +76,8 @@ secondary_entities:
         mapping:
           - scale: 1000
   - entity: sensor
-    class: Phase A power
+    name: Phase A power
+    class: power
     category: diagnostic
     dps:
       - id: 6