add .json to template filename so that it can be better recognized by code editors(like the one on github)

aws/README-zh.md

@@ -20,7 +20,7 @@
 
 确保使用 **AWS 账户根用户** 或者有 **管理员权限** 的 **IAM 用户** 部署此模板。
 
-右键单击这个 [**模板链接**](https://raw.githubusercontent.com/hwdsl2/setup-ipsec-vpn/master/aws/cloudformation-template-ipsec)，并将它保存到你的计算机上的一个新文件。然后在 ["创建堆栈" 向导](https://console.aws.amazon.com/cloudformation/home#/stacks/new)中将其作为模板源上传。
+右键单击这个 [**模板链接**](https://raw.githubusercontent.com/hwdsl2/setup-ipsec-vpn/master/aws/cloudformation-template-ipsec.json)，并将它保存到你的计算机上的一个新文件。然后在 ["创建堆栈" 向导](https://console.aws.amazon.com/cloudformation/home#/stacks/new)中将其作为模板源上传。
 
 ![上传模板](upload-the-template.png)
 

aws/README.md

@@ -20,7 +20,7 @@ Available customization parameters:
 
 Make sure to deploy this template with an **AWS Account Root User** or an **IAM Account** with **Administrator Access**.
 
-Right-click this [**template link**](https://raw.githubusercontent.com/hwdsl2/setup-ipsec-vpn/master/aws/cloudformation-template-ipsec) and save as a file on your computer. Then upload it as the template source in the [stack creation wizard](https://console.aws.amazon.com/cloudformation/home#/stacks/new).
+Right-click this [**template link**](https://raw.githubusercontent.com/hwdsl2/setup-ipsec-vpn/master/aws/cloudformation-template-ipsec.json) and save as a file on your computer. Then upload it as the template source in the [stack creation wizard](https://console.aws.amazon.com/cloudformation/home#/stacks/new).
 
 ![Upload the template](upload-the-template.png)