Move from `github.com/ghodss/yaml` to `sigs.k8s.io/yaml`

[Juneezee]

The github.com/ghodss/yaml package is no longer being actively maintained, see ghodss/yaml#75. sigs.k8s.io/yaml is a permanent fork of github.com/ghodss/yaml, which is actively maintained by Kubernetes SIG and widely used in K8s projects.

We should drop github.com/ghodss/yaml dependency and use sigs.k8s.io/yaml