added more clarity around installation instructions

_includes/sidebar.html

@@ -12,7 +12,7 @@
             {% for item in subcategory.items %}
             {% if item.output contains "web" %}
             {% if item.external_url %}
-            <li><a href="{{item.external_url}}" target="_blank">{{subcategory.title}}</a></li>
+            <li><a href="{{item.external_url}}" target="_blank">{{item.title}}</a></li>
             {% elsif page.url == item.url %}
             <li class="active"><a href="{{item.url | prepend: site.baseurl}}">{{item.title}}</a></li>
             {% else %}