cupper-hugo-theme/layouts/shortcodes/note.html

<aside aria-label="note" class="note">
  <div>
    <svg class="sign" aria-hidden="true" viewBox="0 0 41.667306 41.66729" focusable="false">
      <use href="#info"></use>
    </svg>
    {{ .Inner | markdownify }}
  </div>
</aside>