The breadcrumbs are wrapped in a nav with an aria-label that has
the value of Breadcrumb. The last link of the list should always include an
aria-current with the value of page.
_cmp.breadcrumbs.scss
<nav aria-label="Breadcrumb">
<a class="cmp-breadcrumb" href="#">Page Link</a>
<a class="cmp-breadcrumb" href="#">Page Link</a>
<a class="cmp-breadcrumb" aria-current="page" href="#">Page Link</a>
</nav>