Can't see theme selector tick icon in examples

[julien-deramond]

Prerequisites

• I have searched for duplicate or closed issues
• I have validated any HTML to avoid common problems
• I have read the contributing guidelines

Describe the issue

Bootstrap examples embed a theme selector on the bottom right of the page. It's working well, however, we don't see the tick icon when a mode is selected contrary to what is shown on top of the documentation in the main bar.

This is due to the following rule which is too specific to the main doc navbar:

.bd-navbar .dropdown-menu .active .bi {
  display: block !important;
}

Reduced test cases

Can be seen in all examples (e.g. https://getbootstrap.com/docs/5.3/examples/heroes/).

What version of Bootstrap are you using?

v5.3.1