fix: correct lvms version

Signed-off-by: Chris Butler <chris.butler@redhat.com>

Author: butler54

values-baremetal.yaml

@@ -46,7 +46,7 @@ clusterGroup:
       name: lvms-operator
       namespace: openshift-storage
       source: redhat-operators
-      channel: stable-4.18
+      channel: stable-4.20
       installPlanApproval: Automatic
     nfd:
       name: nfd