fix(feyree_ev_portable_charger): label current b&c as current

Was incorrectly labelled as voltage, which caused duplicates.

custom_components/tuya_local/devices/feyree_ev_portable_charger.yaml

@@ -398,7 +398,7 @@ entities:
           - scale: 10
   - entity: sensor
     class: current
-    translation_key: voltage_x
+    translation_key: current_x
     translation_placeholders:
       x: B
     hidden: unavailable
@@ -420,7 +420,7 @@ entities:
           - value: true
   - entity: sensor
     class: current
-    translation_key: voltage_x
+    translation_key: current_x
     translation_placeholders:
       x: C
     hidden: unavailable