/**
 * Fires after a webmention is updated in the database.
 * 
 * The hook is needed as the comment_post hook uses filtered data.
 *
 * @param int   $comment_ID 
 * @param array $data 
 */
function my_edit_webmention_callback( int $comment_ID, array $data ) {
    // Your code here.
}
add_action( 'edit_webmention', 'my_edit_webmention_callback', 10, 2 );

do_action( 'edit_webmention', $commentdata['comment_ID'], $commentdata )