Add @w-kuhn to contributors list

Author: jonmagic

README.md

@@ -53,6 +53,7 @@ The best way to get your changes merged back into core is as follows:
 * [Corey Leveen](https://github.com/coreyleveen)
 * [Daniel Arthur Gallagher](https://github.com/DanArthurGallagher)
 * [Mosh Feu](https://github.com/moshfeu)
+* [Wendy](https://github.com/w-kuhn)
 
 ## License