docs: udpate readme

Author: yugasun

README.md

@@ -49,8 +49,8 @@ $ npm install -g serverless
 通过如下命令和模板链接，快速创建一个 Express 应用：
 
 ```bash
-$ serverless create --template-url https://github.com/serverless-components/tencent-express/tree/v2/serverless-express
-$ cd serverless-express
+$ serverless create --template-url https://github.com/serverless-components/tencent-express/tree/master/example
+$ cd example
 ```
 
 执行如下命令，安装 Express 应用的对应依赖