Switch from k8s.gcr.io to registry.k8s.io

[msau42]

From kubernetes-announce:
"On the 3rd of April 2023, the old registry k8s.gcr.io will be frozen and no further images for Kubernetes and related subprojects will be pushed to the old registry.

This registry registry.k8s.io replaced the old one and has been generally available for several months. We have published a blog post about its benefits to the community and the Kubernetes project."

[sunnylovestiramisu]

This should be fixed by #425