Update README

Author: yndu13

README-zh-CN.md

@@ -13,7 +13,7 @@
 ![](https://aliyunsdk-pages.alicdn.com/icons/AlibabaCloud.svg)
 
 
-Alibaba Cloud Client for PHP 是帮助 PHP 开发者管理凭据、发送请求的客户端工具，[Alibaba Cloud SDK for PHP][SDK] 由本工具提供底层支持。
+阿里云 V1.0 SDK 即将进入基础安全维护阶段，不再建议使用，建议使用 V2.0 SDK。
 
 
 ## 使用诊断

README.md

@@ -13,7 +13,7 @@ English | [简体中文](/README-zh-CN.md)
 ![](https://aliyunsdk-pages.alicdn.com/icons/AlibabaCloud.svg)
 
 
-Alibaba Cloud Client for PHP is a client tool that helps PHP developers manage credentials and send requests, [Alibaba Cloud SDK for PHP][SDK] dependency on this tool.
+The Alibaba Cloud V1.0 SDK will soon enter the Basic Security Maintenance phase and is no longer recommended for use. It is suggested to use the V2.0 SDK instead.
 
 ## Troubleshoot
 [Troubleshoot](https://api.aliyun.com/troubleshoot?source=github_sdk) Provide OpenAPI diagnosis service to help developers locate quickly and provide solutions for developers through `RequestID` or `error message`.