chore: 升级示例项目为基于 .NET 6.0 的实现

samples/SKIT.FlurlHttpClient.Wechat.TenpayV3.Sample_Net6/Models/CreateOrderByJsapiRequest.cs

@@ -0,0 +1,19 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+
+namespace SKIT.FlurlHttpClient.Wechat.TenpayV3.Sample_Net5.Models
+{
+    public class CreateOrderByJsapiRequest
+    {
+        public string MerchantId { get; set; } = default!;
+
+        public string AppId { get; set; } = default!;
+
+        public string OpenId { get; set; } = default!;
+
+        // NOTICE: 单机演示时金额来源于客户端请求，生产项目请替换成服务端计算生成
+        public int Amount { get; set; }
+    }
+}