fix a typo in README

Author: huandu

README.md

@@ -1,7 +1,7 @@
 # SQL builder for Go
 
 [![Build Status](https://travis-ci.org/huandu/go-sqlbuilder.svg?branch=master)](https://travis-ci.org/huandu/go-sqlbuilder)
-[![GoDoc](https://pkg.go.dev/github.com/huandu/go-sqlbuilder?status.svg)](https://pkg.go.dev/github.com/huandu/go-sqlbuilder)
+[![GoDoc](https://godoc.org/github.com/huandu/go-sqlbuilder?status.svg)](https://pkg.go.dev/github.com/huandu/go-sqlbuilder)
 [![Go Report](https://goreportcard.com/badge/github.com/huandu/go-sqlbuilder)](https://goreportcard.com/report/github.com/huandu/go-sqlbuilder)
 [![Coverage Status](https://coveralls.io/repos/github/huandu/go-sqlbuilder/badge.svg?branch=master)](https://coveralls.io/github/huandu/go-sqlbuilder?branch=master)