Description

Blocks listing links aren't wrapped in a <nav> leading to accessibility issue.
Although it has been done for old fashioned widget, see https://make.wordpress.org/core/2020/07/09/accessibility-improvements-to-widgets-outputting-lists-of-links-in-5-5/

Concerned blocks I found are:

• core/page-list
• core/categories
• core/tag-cloud

core/posts-list might be concerned in some cases.

Step-by-step reproduction instructions

Add one of the mentioned block in a post and see there is no <nav> on frontend.

Screenshots, screen recording, code snippet

No response

Environment info

No response

Please confirm that you have searched existing issues in the repo.

• Yes

Please confirm that you have tested with all plugins deactivated except Gutenberg.

• Yes