editorjs-2.x-dev/templates/ce-block--list.html.twig

<div class="ce-block__content">
  <ul class="cdx-list cdx-list--{{ data.style }}">
    {% for item in data.items %}
      <li class="cdx-list__item">{{ item|raw }}</li>
    {% endfor %}
  </ul>
</div>