Update README

Adding product link for SparkFun Qwiic Dual Solid State Relay

Author: SFEMark

README.md

@@ -25,6 +25,7 @@ Python module for the Qwiic Relays, Listed below
 * [SparkFun Qwiic Single Relay](https://www.sparkfun.com/products/15093)
 * [SparkFun Qwiic Quad Relay](https://www.sparkfun.com/products/15102)
 * [SparkFun Qwiic Quad Solid State Relay](https://www.sparkfun.com/products/16796)
+* [SparkFun Qwiic Dual Solid State Relay](https://www.sparkfun.com/products/16810)
 
 This package can be used in conjunction with the overall [SparkFun qwiic Python Package](https://github.com/sparkfun/Qwiic_Py)