Update README.md

Added ESP32 MicroMod

Author: awende

README.md

@@ -49,6 +49,7 @@ _These boards are supported by [Espressif](https://github.com/espressif/arduino-
 * [SparkFun Thing Plus - ESP32 WROOM](https://www.sparkfun.com/products/14689)
 * [SparkFun ESP32 Thing](https://www.sparkfun.com/products/13907)
 * [SparkFun LoRa Gateway - 1-Channel (ESP32](https://www.sparkfun.com/products/15006)
+* [SparkFun MicroMod ESP32 Processor](https://www.sparkfun.com/products/16781)
 
 ### Installation Instructions