### What would you like to be added?

The apiserver prints a crd update log every 5 minutes. What does this mean? What is the triggering process?



### Why is this needed?

https://github.com/kubernetes/kubernetes/blob/bac1a0ce1b284aff8db1aeeb571d97fa130078a6/staging/src/k8s.io/apiextensions-apiserver/pkg/controller/openapi/controller.go#L228

What Is the Meaning of "Updating CRD OpenAPI spec because xxx changed" in the apiserver Log? 
This is a GitHub Issue
repo:kubernetes
owner:kubernetes
Title : What Is the Meaning of "Updating CRD OpenAPI spec because xxx changed" in the apiserver Log? 
Issue date:

--- start body ---
### What would you like to be added?

The apiserver prints a crd update log every 5 minutes. What does this mean? What is the triggering process?



### Why is this needed?

https://github.com/kubernetes/kubernetes/blob/bac1a0ce1b284aff8db1aeeb571d97fa130078a6/staging/src/k8s.io/apiextensions-apiserver/pkg/controller/openapi/controller.go#L228

--- end body ---
