allow listitems to live in menu (fix #7802)

[FMJansen]

List items are also allowed to exist within a menu element, which is now updated in axe-core.

Fixes #7802

Changes proposed in this pull request:

• add to the list of elements in which a listitem can exist

[chrome-devrel-review-bot]

Hello! This is an automated review by our custom reviewbot. It updates automatically when code or GitHub comments in this pull request are created or updated.

Requested changes

If there are any common problems with the content files you created or modified, they will be listed here.

src/site/content/en/lighthouse-accessibility/listitem/index.md

• Please change your usage of the following words:
  • Do not use master. Affected lines: 39

[FMJansen]

Concerning the devrel-review-bot: https://github.com/GoogleChrome/lighthouse/issues/13925

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. To prevent this from happening, leave a comment.

[FMJansen]

This change is still needed, I think by now Chrome has updated, too.