core(listitem): mention li can be contained by a menu

[FMJansen]

Summary
Axe-core has been updated to allow listitems to exist inside menu elements, in accordance with the HTML spec. So, this text should be updated since axe-core has been updated to 4.4.x (37a1ceb)

Related to GoogleChrome/web.dev#7802 and GoogleChrome/web.dev#7803 in the web.dev repo.

Menu spec: https://html.spec.whatwg.org/multipage/grouping-content.html#the-menu-element
Menu on MDN: https://developer.mozilla.org/en-US/docs/Web/HTML/Element/menu

Related Issues/PRs
#13926

[adamraine]

You will need to run yarn update:sample-json and commit the changes since this modifies one of our translated UI strings.

[FMJansen]

Ah, got it, missed that before!

[connorjclark]

This is our fault, but we have a newly extra step to deal with too: yarn update:flow-sample-json

@adamraine wdyt of having yarn update:sample-json just do both? I always forget too.

[FMJansen]

At least the error said it, too, haha, done! :D

[adamraine]

@adamraine wdyt of having yarn update:sample-json just do both? I always forget too.

SGTM

[FMJansen]

I see some tests are failing but this is a little over my head, do I need to fix something on my end?

[connorjclark]

You won't believe it but... we also have to run yarn update:test-devtools to update some other tests. I'll take care of it from here, though, just a minute.

[FMJansen]

Haha I found that command in one of the failed test messages, but when I ran it nothing changed so I was already confused. Thanks for picking it up :)

[connorjclark]

Thanks!