nvmeof: change ceph verion for test

test on tentacle ceph v20

Signed-off-by: gadi-didi <gadi.didi@ibm.com>

Author: gadididi

build.env

@@ -61,7 +61,7 @@ CHANGE_MINIKUBE_NONE_USER=true
 # Rook options
 ROOK_VERSION=v1.18.4
 # Provide ceph image path
-ROOK_CEPH_CLUSTER_IMAGE=quay.io/ceph/ceph:v19.2.2
+ROOK_CEPH_CLUSTER_IMAGE=quay.io/ceph/ceph:v20
 
 # CSI sidecar version
 K8S_IMAGE_REPO=registry.k8s.io/sig-storage