Ta bort :root och :where styles från nyare WP-versioner

Remove :root and :where inline css styles from newer WP versions. https://core.trac.wordpress.org/ticket/61660#:~:text=would%20be%20great.-,%2336,-%40butterflymedia%0A5

add_action(
    'wp_head',
    function () {
    	global $wp_styles;

        if ( ! empty( $wp_styles->registered['global-styles']->extra['after'][0] ) ){
    		$wp_styles->registered['global-styles']->extra['after'][0] = str_replace(
                [
                    ':root :where',
                    ':root',
                    ':where',
                ],
                '',
                $wp_styles->registered['global-styles']->extra['after'][0]
            );
        }
    },
    1
);