Fix Google Analytics code

It was not reporting because our URL changed.

Signed-off-by: Ben Firshman <ben@firshman.co.uk>

docs/_layouts/default.html

@@ -63,7 +63,7 @@
       m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
       })(window,document,'script','//www.google-analytics.com/analytics.js','ga');
 
-      ga('create', 'UA-43996733-3', 'orchardup.github.io');
+      ga('create', 'UA-43996733-3', 'auto');
       ga('send', 'pageview');
 
     </script>