Update README.md

Author: davetcc

README.md

@@ -45,6 +45,7 @@ Please raise all questions in the main TcMenu repository discussions.
 
 You can ask questions either in the [discussions section of the tcMenu repo](https://github.com/davetcc/tcMenu/discussions), or using the Arduino forum. We generally answer most questions, but the rules of engagement are: **this is my hobby, I make it available because it helps others**. Don't expect immediate answers, make sure you've recreated the problem in a simple sketch that you can send to me. Please consider making at least a one time donation using the sponsor link if we do help you out.
 
+* [UTF-8 decoder and Unicode font documentation on TheCodersCorner.com](https://www.thecoderscorner.com/products/arduino-libraries/tc-unicode-helper/)
 * [discussions section of the tcMenu repo](https://github.com/davetcc/tcMenu/discussions) of tcmenu git repo
 * [Arduino discussion forum](https://forum.arduino.cc/) where questions can be asked, please tag me using `@davetcc`.
 * [Legacy discussion forum probably to be made read only soon](https://www.thecoderscorner.com/jforum/).