Timestamp Announce limitation

[amal-khalaf]

#3616

Fixes #

Changelog Entry

Description

Adding documentation to the grouped time stamp announced limitation
where once a live region element is written to the DOM and marked with aria attribute to be logged
it is added to narration queue so even if we removed the element from the DOM later on it will still be announced.

• I have added tests and executed them locally
• I have updated CHANGELOG.md
• I have updated documentation

Review Checklist

This section is for contributors to review your work.

• Accessibility reviewed (tab order, content readability, alt text, color contrast)
• Browser and platform compatibilities reviewed
• CSS styles reviewed (minimal rules, no z-index)
• Documents reviewed (docs, samples, live demo)
• Internationalization reviewed (strings, unit formatting)
• package.json and package-lock.json reviewed
• Security reviewed (no data URIs, check for nonce leak)
• Tests reviewed (coverage, legitimacy)

[corinagum]

LGTM pending comments!