fix nodeschool link #3

README.md

@@ -8,7 +8,7 @@ _I'm actively working on this and will redo this readme when it's ready to use.
 
 A [workshopper](https://github.com/rvagg/workshopper) module for learning Git and GitHub - Social coding, y'all.
 
-These modules run a little app in your terminal and users work their way through the challenges. See [nodeschool.io](http://www.nodeschool.io) for more.
+These modules run a little app in your terminal and users work their way through the challenges. See [nodeschool.io](http://nodeschool.io) for more.
 
 ## The Rough Plan
 
@@ -49,4 +49,4 @@ git-it
 _notes to self_
 - add intro to terminal/bash/shell
 - something about text editors
-- add git diff in challenge
+- add git diff in challenge