revert(user-center): restore promotion center ratio label

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

inc/helpers/user-center-renderers/sidebar-creator.php

@@ -63,7 +63,7 @@ if ($revenue_url !== '') {
 		'icon'     => aksrt_icon_markup('zibsvg-money-color', 'mr6'),
 		'title'    => __('推广中心', 'aksrt'),
 		'first'    => $rebate_ratio . '%',
-		'first_l'  => __('佣金比例', 'aksrt'),
+		'first_l'  => __('比例', 'aksrt'),
 		'second'   => $rebate_value,
 		'second_l' => $rebate_label,
 	];