ARIA issues

[hturner]

Picked up with Accessible Web Helper extension:

On bibliographic entries: ARIA role doc-biblioentry is not allowed for given element.

The checker also complains about ARIA attributes on the citations, e.g.

<span class="citation" data-cites="powersOpenScienceReproducibility2019" aria-expanded="false">Powers and Hampton (<a href="#ref-powersOpenScienceReproducibility2019" role="doc-biblioref">2019</a>)</span>

However I check with @ajrgodfrey and he did not consider this critical as the references were accessible via a screen reader on click, even if the hover is not accessible.

[dicook]

Ignoring this for now