update comment

views/layout.pug

@@ -25,7 +25,7 @@ html(lang='')
     script(async defer src="https://buttons.github.io/buttons.js")
     script(src='/js/main.js')
 
-    //- Google Analytics: change UA-XXXXX-X to be your site's ID
+    //- Google Analytics: change UA-38177297-2 to be your site's ID
     script.
       window.ga=function(){ga.q.push(arguments)};ga.q=[];ga.l=+new Date;
       ga('create','UA-38177297-2','auto');ga('send','pageview')