extension-workshop/_includes/documentation-topics.html

{% for item in site.data.pages %}
    {% if item.title == "Documentation Topics" && item.subfolderitems %}
    	<aside class="documentation-topics">
    		<div class="grid-container grid-x grid-padding-x">
		        <div class="cell small-12">
		        	<h6>{{ item.title }}</h6>       
		            <ul>
		                {% for subitem in item.subfolderitems %}
		                    <li><a href="{{ subitem.url | relative_url }}"{% if pg.target %} target="{{ pg.target }}"{% endif %}>{{ subitem.title }}</a></li>
		                {% endfor %}
		            </ul>
		        </div>
		    </div>
        </aside>
    {% endif %}
{% endfor %}