fix typo

Author: huiguangjun

README.md

@@ -6,7 +6,7 @@
 
 ## [README of Chinese](https://github.com/aliyun/aliyun-oss-php-sdk/blob/master/README-CN.md)
 
-## About OSS SDK for Go PHP V2
+## About OSS SDK for PHP V2
 > - OSS SDK for PHP V2([alibabacloud-oss-php-sdk-v2](https://github.com/aliyun/alibabacloud-oss-php-sdk-v2)) beta version has been released, it is a major rewrite of OSS SDK for PHP V1 (aliyun-oss-php-sdk).
 > - V2 simplifies underlying operations such as identification authentication, automatic retry of failed requests, and error handling. It provides flexible parameter configuration methods and rich advanced operations, such as paginator, transmission managers. This comprehensively improves development efficiency and experience.