Update regression matrix to include old k8s#6977

vepatel merged 1 commit intorelease-4.0nginx/kubernetes-ingress:release-4.0from

cherry-pick-release-4.0-f92a20a929cc0c4f500f358f26c757121fda67c6nginx/kubernetes-ingress:cherry-pick-release-4.0-f92a20a929cc0c4f500f358f26c757121fda67c6Copy head branch name to clipboard