add release badge

readme.md

@@ -1,8 +1,9 @@
-# go-zero项目介绍
+# go-zero
 
 [![Go](https://github.com/tal-tech/go-zero/workflows/Go/badge.svg?branch=master)](https://github.com/tal-tech/go-zero/actions)
 [![codecov](https://codecov.io/gh/tal-tech/go-zero/branch/master/graph/badge.svg)](https://codecov.io/gh/tal-tech/go-zero)
 [![Go Report Card](https://goreportcard.com/badge/github.com/tal-tech/go-zero)](https://goreportcard.com/report/github.com/tal-tech/go-zero)
+[![Release](https://img.shields.io/github/v/release/tal-tech/go-zero.svg?style=flat-square)](https://github.com/tal-tech/go-zero)
 [![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT)
 
 ## 1. go-zero框架背景