Updating broken link (and pointing to new pkg.go.dev)
### Using Go
-If you are using Go, we have an easy to use client package: [found here](https://godoc.org/github.com/Comcast/kuberhealthy/v2/pkg/checks/external/checkclient).
+If you are using Go, we have an easy to use client package: [found here](https://pkg.go.dev/github.com/Comcast/kuberhealthy/pkg/checks/external/checkclient).
example code:
