Add note about Sonoff Basic R2 and R3

README.md

@@ -262,7 +262,7 @@ Here is the list of supported hardware. For more information please refer to the
 ||||
 |---|---|---|
 |![Itead Sonoff Basic](images/devices/itead-sonoff-basic.jpg)|![Itead Sonoff Dual/Dual R2](images/devices/itead-sonoff-dual.jpg)|![Itead Sonoff TH10/TH16](images/devices/itead-sonoff-th.jpg)|
-|**Itead Sonoff Basic**|**Itead Sonoff Dual/Dual R2**|**Itead Sonoff TH10/TH16**|
+|**Itead Sonoff Basic (including R2 and R3)**|**Itead Sonoff Dual/Dual R2**|**Itead Sonoff TH10/TH16**|
 |![Electrodragon WiFi IOT](images/devices/electrodragon-wifi-iot.jpg)|![OpenEnergyMonitor WiFi MQTT Relay / Thermostat](images/devices/openenergymonitor-mqtt-relay.jpg)||
 |**Electrodragon WiFi IOT**|**OpenEnergyMonitor WiFi MQTT Relay / Thermostat**||
 |![Itead Sonoff 4CH](images/devices/itead-sonoff-4ch.jpg)|![Itead Sonoff 4CH Pro](images/devices/itead-sonoff-4ch-pro.jpg)||