Migrated from @blog -> @site

no issue

- This rename is due to new {{@site}} alias introduced in Ghost (dd1cf5ffc7) as {{@blog}} variable is deprecated now, and will be removed in v3

index.hbs

@@ -3,9 +3,9 @@
 into the {body} of the default.hbs template --}}
 
 {{#is "home"}}
-    {{#if @blog.description}}
+    {{#if @site.description}}
     <header class="page-head">
-        <h2 class="page-head-title">{{@blog.description}}</h2>
+        <h2 class="page-head-title">{{@site.description}}</h2>
     </header>
     {{/if}}
 {{/is}}