update doc

src/document/cn/apis.js

@@ -681,6 +681,7 @@
  * @apiDescription
  * 接入微信小程序需完成海外主体认证，并且认证主体需要与在RoyalPay开通的商户主体一致。具体如何认证请查看微信公众平台相关文档。
  * 用于小程序中发起支付，创建订单后返回小程序支付所需参数，该接口现仅支持微信小程序。
+ * 接入参考文档:https://www.royalpay.com.au/downloads/MiniProgram_WechatPay.pdf
  * <br>
  *     <img src="img/microapp_cn.png">
  * @apiVersion 1.0.0

src/document/en/apis.js

@@ -698,6 +698,7 @@
  * @apiName microapp
  * @apiDescription
  Use for wechat Payment in miniprogram. After create order, returned and redirect param.
+ MiniProgram_WechatPay doc: https://www.royalpay.com.au/downloads/MiniProgram_WechatPay.pdf
  *     wechat Channel Only.<br> * <br>
  *     <img src="img/microapp_en.png">
  * @apiVersion 1.0.0