ARIA in HTML is removing the allowances for doc-biblioentry and doc-endnote on <li> elements.

These are not technically valid children of ul, ol or role=list elements per the ARIA spec. Due to this, these roles are being deprecated in DPUB ARIA 1.1. Authors should be using standard list elements, or role=list and role=listitem elements instead.

Edited issue description to provide more clarity / per the closure of the original PR.