fixing small sidebar display issue with code

_includes/sidebar.html

@@ -11,7 +11,7 @@
             {% for folderitem in folder.folderitems %}
             {% if folderitem.output contains "web" %}
             {% if folderitem.external_url %}
-            <li><a href="{{item.external_url}}" target="_blank">{{folderitem.title}}</a></li>
+            <li><a href="{{folderitem.external_url}}" target="_blank">{{folderitem.title}}</a></li>
             {% elsif page.url == folderitem.url %}
             <li class="active"><a href="{{item.url | prepend: site.baseurl}}">{{folderitem.title}}</a></li>
             {% else %}