Remove "https" from client links

Author: jordanmccullough

downloads/github-git-cheat-sheet.md

@@ -6,10 +6,10 @@ Git is the open source distributed version control system that facilitates GitHu
 GitHub provides desktop clients that include a graphical user interface for the most common repository actions and an automatically updating command line edition of Git for advanced  scenarios.
 
 ### GitHub for Windows
-https://windows.github.com
+http://windows.github.com
 
 ### GitHub for Mac
-https://mac.github.com
+http://mac.github.com
 
 Git distributions for Linux and POSIX systems are available on the official Git SCM web site.