doc(readme): add go reference badge

Author: hedon954

README.md

@@ -4,6 +4,7 @@
 [![codecov](https://codecov.io/gh/hedon954/go-mysql-mocker/graph/badge.svg?token=RtwHYWTrso)](https://codecov.io/gh/hedon954/go-mysql-mocker)
 [![CI](https://github.com/hedon954/go-mysql-mocker/workflows/build/badge.svg)](https://github.com/hedon954/go-mysql-mocker/actions)
 [![GitHub release (latest SemVer)](https://img.shields.io/github/v/release/hedon954/go-mysql-mocker?sort=semver)](https://github.com/hedon954/go-mysql-mocker/releases)
+[![Go Reference](https://pkg.go.dev/badge/github.com/hedon954/go-mysql-mocker.svg)](https://pkg.go.dev/github.com/hedon954/go-mysql-mocker@v0.0.1)
 
 
 `go-mysql-mocker(gmm)` was created to provide developers with a reliable and straightforward tool for mocking MySQL interactions in Go applications, particularly for automated testing environments. By simulating a MySQL server, `go-mysql-mocker` allows developers to conduct integration tests without the overhead of setting up a real database, thus speeding up test cycles and reducing external dependencies. This is especially useful in continuous integration (CI) environments where test reliability and speed are paramount.