修复支付宝待签约状态时，获取签约地址

AppStart/Helper/CheckAlipaySignService.cs

@@ -70,7 +70,7 @@ namespace MySystem
                             {
                                 merchant.QueryCount = 1;
                             }
-                            string confirm_url = "/static/alipay_confirm_url/";
+                            string confirm_url = dic["alipay_open_agent_order_query_response"]["confirm_url"].ToString();
                             string fileName = function.MD5_16(Guid.NewGuid().ToString());
                             function.CreateQRCode2(sign_url, fileName, "/" + confirm_url);
                             merchantadd.AlipaySignUrl = confirm_url;