This is the last reference to extensions/v1beta1 API in our docs(this was removed in Kubernetes 1.22 release). Removing old
references from our docs. The remaining references are in the blogs referencing previous releases (won't update those).
Partially Fixes: #12216
* Add CORS faq
This is very commonly confused topic, so having a page will hopefully
help or provide a simple link to users struggling.
* Apply suggestions from code review
Co-authored-by: Frank Budinsky <frankb@ca.ibm.com>
Co-authored-by: Frank Budinsky <frankb@ca.ibm.com>