Added TuyaMCU reference

Author: jasonacox

README.md

@@ -313,6 +313,7 @@ The following table represents several of the standard Tuya DPS values and their
 ### Tuya References
 
 * Tuya Hardware Development - Protocol: https://developer.tuya.com/en/docs/iot/device-development/embedded-software-development/mcu-development-access/wifi-mcu-sdk-solution/tuya-cloud-universal-serial-port-access-protocol?id=K9hhi0xxtn9cb
+* TuyaMCU listing of Tuya DP IDs: https://tasmota.github.io/docs/TuyaMCU/#switches-or-plugspower-strips
 
 ## Credits