Update plugin_growatt.py

Rename Charger Switch but not key name

Author: flopp999

custom_components/solax_modbus/plugin_growatt.py

@@ -1706,7 +1706,7 @@ def value_function_inverter_module(initval, descr, datadict):
         icon = "mdi:run",
     ),
     GrowattModbusSelectEntityDescription(
-        name = "Charger Switch",
+        name = "Allow Grid Charge",
         key = "charger_switch",
         register = 3049,
         option_dict = {