Update readme.md

Author: Rexeh

readme.md

@@ -10,7 +10,7 @@
 
 [Release Notes - V1.2.1](https://github.com/Rexeh/joystick-diagrams/releases/tag/V1.2.1)
 
-[Download - Joystick Diagrams (V1.2.0)](https://github.com/Rexeh/joystick-diagrams/releases/download/V1.2.0/joystick_diagrams_1_2_0.zip)
+[Download - Joystick Diagrams (V1.2.1)](https://github.com/Rexeh/joystick-diagrams/releases/download/V1.2.1/joystick_diagrams_1_2_1.zip)
 
 ## What is this tool for?
 Learning flight simulators is a daunting task, with lots of buttons to remember. I built this tool for myself, and then thought others might also enjoy it, automating what is a time consuming task!