{% assign fields = site.data.config-table | map: 'display_name' %}

<div class="table-responsive-md">
  <table id="item-table" class="table table-striped">
    <thead>
      <tr>
        {% for f in fields %}
        <th scope="col">{{ f }}</th>
        {% endfor %}
        <th>Link</th>
      </tr>
    </thead>
  </table>
</div>