Update docs/_themes/kr/layout.html

Line 27: var ga2 = document.createElement('script');ga.type = 'text/javascript'; 

i think it is wrongly typed ga.type, so i changed into ga2.type

change
======
ga2.type = 'text/javascript'; 

Author: suhail

docs/_themes/kr/layout.html

@@ -24,7 +24,7 @@
       _gaq2.push(['_trackPageview']);
 
       (function() {
-        var ga2 = document.createElement('script'); ga.type = 'text/javascript'; ga2.async = true;
+        var ga2 = document.createElement('script'); ga2.type = 'text/javascript'; ga2.async = true;
         ga2.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
         var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga2, s);
       })();