title: How to set verbose name for django user defiend admin action
body: <p>As in django <a href="https://docs.djangoproject.com/en/2.1/ref/contrib/admin/actions/" rel="nofollow noreferrer">documentation here</a>, I wrote my first Django action like this:</p>
  <pre><code>def make_verified(modeladmin, request, queryset):
      query_set.update(title='new title')
  </code></pre>
  <p>It works pretty right. But I need to change the shown name for this action. currently, the name is shown as below:</p>
  <p><a href="https://i.stack.imgur.com/F8iGn.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/F8iGn.png" alt="admin action shown picture" /></a></p>
  <p>It means the name of the function which handles the action of this choice.
  I couldn't find anything about this in the documentation.</p>
  <p>How can I set verbose for this?</p>
  <p>Any help will be appreciated.</p>