Add additional accessibility-related authoring advice regarding <details>#9989

Merged

domenic merged 2 commits intowhatwg:mainfrom dbaron:accordion-grouping

Jan 9, 2024

+13-3

Commits on Dec 12, 2023

Add additional accessibility-related authoring advice regarding <details>.
dbaron
committed

Commits on Dec 15, 2023

Address review comments and incorporate (with edits) suggestions from @scottaohara .
dbaron
committed