fix code error

biz-hd/order/services/OrderService.php

@@ -244,7 +244,7 @@ class OrderService extends BaseService
         $modifyPrice = isset($data['modifyPrice']) && $data['modifyPrice'] > 0 ? $data['modifyPrice'] : 0;
         $memberDiscount = $custom->discount ?? 1;
         if (is_numeric($memberDiscount) && $memberDiscount > 0 && $memberDiscount < 1.0 && $modifyPrice > 0) {
-            $modifyPrice = bcdiv(bcmul($modifyPrice, $memberDiscount, 3), 10, 2);
+            $modifyPrice = bcmul($modifyPrice, $memberDiscount, 2);
             if (bccomp($modifyPrice, '0', 2) <= 0) {
                 $modifyPrice = 0.01;
             }