MPPT 4048 solar charger: rename duplicate load current sensor

The previously tagged "(unknown)" version of this sensor causes a naming conflict after the tag is removed, rename with 2 suffix to disambiguate.

custom_components/tuya_local/devices/mppt_4048_solarcharger.yaml

@@ -312,7 +312,7 @@ entities:
         unit: V
         class: measurement
   - entity: sensor
-    name: Load current
+    name: Load current 2
     hidden: true
     class: current
     category: diagnostic