adjust GA tracking code

_layouts/default.html

@@ -22,7 +22,7 @@
       (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
       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-3189083-1', 'auto');
+      ga('create', 'UA-3189083-2', 'auto');
       ga('send', 'pageview');
     </script>
   </body>