This ensures that the post lock data returned by the Heartbeat API is consistent.
Previously, `wp_check_locked_posts()` was updated to return the name of the user currently editing the post, but the `wp_refresh_post_lock()` response did not get a similar change.
Follow-up to [53070].
Props nathan.noom.
Fixes#56197.
Built from https://develop.svn.wordpress.org/trunk@53692
git-svn-id: http://core.svn.wordpress.org/trunk@53251 1a063a9b-81f0-0310-95a4-ce76da25c4cd