Feature Request: Accessibility and headings in your components

Created by: k-spen

I have noticed in some of your components, headings are used. Headings are also used by screen readers for the blind. The readers scan the page for headings and then organize them to be browsed. If I take a component, like an accordion that uses an h5 in the .card-header element and the last heading before my that accordion in my page was an h2, this breaks accessibility rules. The reader would expect an h3. Usually I just change them to divs and use role='heading' but I am also using ng-bootstrap. I have reached out them about this and they have recommended that I contact you guys. They would be willing to update this when the original code is updated. Would you please consider making your components more screen reader compliant? Thank you.