Update about_git.html

Specified the server name for #git channel

mysite/missions/templates/missions/git/about_git.html

@@ -27,7 +27,7 @@ <h3>Other resources</h3>
 <ul class="raquo_bullets">
   <li>The <a href="http://git-scm.com/">website</a> for the git project contains a quickstart guide and links to <a href="http://git-scm.com/documentation"> other useful resources</a>.</li>
   <li>The <a href="http://book.git-scm.com/"> Git Community Book</a> is a wonderful resource for more in depth explanation of git's features.</li>
-  <li>Many git users chat on the #git channel on IRC</li>
+  <li>Many git users chat on the #git channel on freenode.net IRC </li>
 </ul>
 
 <p>The purpose of this mission is to teach you how to clone a remote repository, make changes to a file, check them into your local copy, and finally create a patch file.</p>