Update README.md

Author: wangyongtao

go/README.md

@@ -1,30 +1,31 @@
 Golang
 
-## Install
+最新官网 Go.dev  https://go.dev
 
-[golang.org](https://golang.org)
+## Install
 
-[golang.google.cn](https://golang.google.cn)
+[golang.org](https://golang.org)  
+[golang.google.cn](https://golang.google.cn) 国内镜像  
 
 
-check version:
+查看版本 check version:
 
 ```go
 $ which go
 /usr/local/go/bin/go
 
 $ go version 
-go1.15.6 darwin/amd64
+go version go1.18 darwin/amd64
 ```
 
 
 ## Write some code
 
-create directory `go`: 
+create directory `helloworld`: 
 
 ```
-$ mkdir go
-$ cd go 
+$ mkdir helloworld
+$ cd helloworld 
 ```
 
 create file `main.go` :