Fix badge link in README.md

README.md

@@ -1,6 +1,6 @@
 # gopsutil: psutil for golang
 
-[![Test](https://github.com/shirou/gopsutil/actions/workflows/test.yml/badge.svg)](https://github.com/shirou/gopsutil/actions/workflows/test.yml) [![Coverage Status](https://coveralls.io/repos/github/shirou/gopsutil/badge.svg?branch=master)](https://coveralls.io/github/shirou/gopsutil?branch=master) [![Go Reference](https://pkg.go.dev/badge/github.com/shirou/gopsutil/v3.svg)](https://pkg.go.dev/github.com/shirou/gopsutil/v3) [![Go Documentation](https://godocs.io/github.com/shirou/gopsutil/v3?status.svg)](https://godocs.io/github.com/shirou/gopsutil/v3) [![Calendar Versioning](https://img.shields.io/badge/calver-vMAJOR.YY.MM-22bfda.svg)](https://calver.org/)
+[![Test](https://github.com/shirou/gopsutil/actions/workflows/test.yml/badge.svg)](https://github.com/shirou/gopsutil/actions/workflows/test.yml) [![Coverage Status](https://coveralls.io/repos/github/shirou/gopsutil/badge.svg?branch=master)](https://coveralls.io/github/shirou/gopsutil?branch=master) [![Go Reference](https://pkg.go.dev/badge/github.com/shirou/gopsutil/v4.svg)](https://pkg.go.dev/github.com/shirou/gopsutil/v4) [![Go Documentation](https://godocs.io/github.com/shirou/gopsutil/v4?status.svg)](https://godocs.io/github.com/shirou/gopsutil/v4) [![Calendar Versioning](https://img.shields.io/badge/calver-vMAJOR.YY.MM-22bfda.svg)](https://calver.org/)
 
 This is a port of psutil (https://github.com/giampaolo/psutil). The
 challenge is porting all psutil functions on some architectures.