Update default.html

fix file name

Author: lkurz

_layouts/default.html

@@ -5,7 +5,8 @@
     <meta charset="UTF-8">
     <meta http-equiv="X-UA-Compatible" content="IE=edge">
     <meta name="viewport" content="width=device-width, initial-scale=1">
-    {% include analytics.html %}
+
+{% include google-analytics.html %}
 
 {% seo %}