CoC: replace with CNCF one
# Kubernetes Community Code of Conduct
-Please refer to our [Kubernetes Community Code of Conduct](https://git.k8s.io/community/code-of-conduct.md)
+CRI-O adheres to the [CNCF Code of Conduct](https://github.com/cncf/foundation/blob/fff715fb000ba4d7422684eca1d50d80676be254/code-of-conduct.md), and it should be referred to for Code of Conduct queries.
