Add unit for Amphiro/Oras shower head (#1265)

main/config_mqttDiscovery.h

@@ -221,6 +221,7 @@ const char* availableHASSClasses[] = {"battery",
 const char* availableHASSUnits[] = {"W",
                                     "kW",
                                     "V",
+                                    "kWh",
                                     "A",
                                     "W",
                                     "°C",
@@ -228,6 +229,7 @@ const char* availableHASSUnits[] = {"W",
                                     "ms",
                                     "s",
                                     "hPa",
+                                    "L",
                                     "kg",
                                     "lb",
                                     "µS/cm",