updated the url to the new repo name

Author: schacon

layout/book_index_template.html

@@ -49,7 +49,7 @@ <h3>The Git Community Book</h3>
       <p>
         If you see anything out of date, have a suggestion on how to improve it,
         or would like to help add to the book,
-        please see the <a href="http://github.com/schacon/learn-github/wikis/how-to-contribute">How to Contribute</a> page, or just send
+        please see the <a href="http://github.com/schacon/gitscm/wikis/how-to-contribute">How to Contribute</a> page, or just send
         <a href="mailto:schacon@gmail.com">our maintainer</a> a note.
     </div>
   </div>

layout/html_template.html

@@ -38,7 +38,7 @@ work in Git.
 At any point, if you see a mistake or want to contribute to the book, you can 
 send me an email at [schacon@gmail.com](mailto://schacon@gmail.com), or you
 can clone the source of this book at 
-[http://github.com/schacon/learn-github](http://github.com/schacon/learn-github)
+[http://github.com/schacon/gitscm](http://github.com/schacon/gitscm)
 and send me a patch or a pull-request.
 
 ### References ###