foundry/Data/systems/dnd5e/templates/advancement/advancement-confirmation-dialog.hbs

<div class="dialog-content">
  <p>
    {{content}}
  </p>
  <label style="display: block; margin-block-end: 1em;" class="checkbox">
    <input type="checkbox" name="apply-advancement" checked>
    {{localize "DND5E.AdvancementDeleteConfirmationLabel"}}
  </label>
</div>
<div class="dialog-buttons">
  {{#each buttons as |button id|}}
    <button class="dialog-button {{cssClass}}" data-button="{{id}}">
      {{{button.icon}}}
      {{{button.label}}}
    </button>
  {{/each}}
</div>