corrected the download for windows users into simple zip

Author: alexanderkustov

html/lesson3/assets/lesson3.zip

@@ -20,7 +20,7 @@ We will also be explaining in more detail elements that we mentioned in our prev
 
 ### Required files
 
-Download the files required to begin working through the tutorial from [here](https://gist.github.com/despo/7328342/download)
+Download the files required to begin working through the tutorial from [here](assets/lesson3.zip)
 
 ### Development Tools - Inspectors