Update HCOVersion to 4.18.23

Author: cnv-bot-axuba

_attributes/common-attributes.adoc

@@ -123,7 +123,7 @@ endif::[]
 //openshift virtualization (cnv)
 :VirtProductName: OpenShift Virtualization
 :VirtVersion: 4.18
-:HCOVersion: 4.18.17
+:HCOVersion: 4.18.23
 :HCOVersionPrev: 4.17.0
 :CNVNamespace: openshift-cnv
 :CNVOperatorDisplayName: OpenShift Virtualization Operator