https://www.w3.org/TR/css-highlight-api-1/#priorities
<rdar://problem/113411814>
Pull request: https://github.com/WebKit/WebKit/pull/16406
Committed 266611@main (33bc17e9351e): <https://commits.webkit.org/266611@main> Reviewed commits have been landed. Closing PR #16406 and removing active labels.
Submitted web-platform-tests pull request: https://github.com/web-platform-tests/wpt/pull/41357