Update default.html

Author: nirhasabnis

_layouts/default.html

@@ -7,7 +7,7 @@
 
 {% seo %}
     <!-- link rel="stylesheet" href="{{ "/assets/css/style.css?v=" | append: site.github.build_revision | relative_url }}"> -->
-    <link rel="stylesheet" href="{{_layouts/style.css | relative_url}}">
+    <link rel="stylesheet" href="{{site.css | relative_url}}">
     <!--[if lt IE 9]>
     <script src="https://cdnjs.cloudflare.com/ajax/libs/html5shiv/3.7.3/html5shiv.min.js"></script>
     <![endif]-->