Backport of Update K8s changelog to address cloud auto-join change in 1.0.0 into release/1.14.x#18296

pglass merged 1 commit intorelease/1.14.xhashicorp/consul:release/1.14.xfrom

backport/docs/NET-4881/k8s-cloud-auto-join-1.0-release-note/violently-subtle-emuhashicorp/consul:backport/docs/NET-4881/k8s-cloud-auto-join-1.0-release-note/violently-subtle-emuCopy head branch name to clipboard