Update README.md

Author: davidchesnut

README.md

@@ -6,7 +6,7 @@ This repository contains the source code used by the [Yo Office generator](https
 
 This template is written using [TypeScript](http://www.typescriptlang.org/). For the JavaScript version of this template, go to [Office-Addin-TaskPane-JS](https://github.com/OfficeDev/Office-Addin-TaskPane-JS).
 
-## Debugging custom functions
+## Debugging
 
 This template supports debugging using any of the following techniques: