[v5][doc] or [dropdown] show class applied to element

Created by: piernik

Doc's says: https://v5.getbootstrap.com/docs/5.0/components/dropdowns/#usage

Via data attributes or JavaScript, the dropdown plugin toggles hidden content (dropdown menus) by toggling the .show class on the parent list item.

But (using first example from docs) it turns out that show class must be applied to .dropdown-menu element not on '.dropdown' or .dropdown-toggle`.

Doc is not precise.

<div class="dropdown">
  <button class="btn btn-secondary dropdown-toggle show" type="button" id="dropdownMenuButton" data-toggle="dropdown" aria-expanded="true">
    Dropdown button
  </button>
  <ul class="dropdown-menu show" aria-labelledby="dropdownMenuButton" x-placement="bottom-start" style="position: absolute; will-change: transform; top: 0px; left: 0px; transform: translate3d(0px, 38px, 0px);">
    <li><a class="dropdown-item" href="#">Action</a></li>
    <li><a class="dropdown-item" href="#">Another action</a></li>
    <li><a class="dropdown-item" href="#">Something else here</a></li>
  </ul>
</div>