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

error.hbs

@@ -3,7 +3,7 @@
 <header class="page-head error-head">
     <h1 class="page-head-title">{{code}}</h1>
     <p class="page-head-description">{{message}}</p>
-    <a class="error-link" href="{{@blog.url}}">Go to the front page →</a>
+    <a class="error-link" href="{{@site.url}}">Go to the front page →</a>
 </header>
 
 {{#if errorDetails}}
@@ -24,4 +24,4 @@
         </ul>
     </section>
 </div>
-{{/if}}
+{{/if}}