[A11Y] aria-current on active menu item

[laryn]

Description of the bug

An accessibility review on a site in development called out the following:

No aria dictating the "active" element in the navigation for a non-visual user using a screen reader

The solution?

aria-current="page" on the active <a>

• https://developer.mozilla.org/en-US/docs/Web/Accessibility/ARIA/Attributes/aria-current

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Cross-posted: backdrop/backdrop-issues#6234

[vadikom]

Yep, that should do it. This is fixed in the upcoming v2.0.