K8s: X-Wing release notes (#1411)

* typo

* initial draft

* RN edits

* release notes

* relref

* copy edits

* link to API reference

* vanilla k8s

* openshift

* EKS

* aks

* gke

* rancher

* tkg

* tkgi

* spacing issue

* update version numbers

* call home client

Author: kaitlynmichael