Fix naming of "State of charge" sensor in growatt_server (home-assistant#151619)

Author: NoRi2909

homeassistant/components/growatt_server/strings.json

@@ -86,7 +86,7 @@
         "name": "Inverter temperature"
       },
       "mix_statement_of_charge": {
-        "name": "Statement of charge"
+        "name": "State of charge"
       },
       "mix_battery_charge_today": {
         "name": "Battery charged today"
@@ -425,7 +425,7 @@
         "name": "Lifetime total load consumption"
       },
       "tlx_statement_of_charge": {
-        "name": "Statement of charge (SoC)"
+        "name": "State of charge (SoC)"
       },
       "total_money_today": {
         "name": "Total money today"