Update HCOVersion to 4.19.3

Author: cnv-bot-axuba

_attributes/common-attributes.adoc

@@ -114,7 +114,7 @@ endif::[]
 //openshift virtualization (cnv)
 :VirtProductName: OpenShift Virtualization
 :VirtVersion: 4.19
-:HCOVersion: 4.19.1
+:HCOVersion: 4.19.3
 :CNVNamespace: openshift-cnv
 :CNVOperatorDisplayName: OpenShift Virtualization Operator
 :CNVSubscriptionSpecSource: redhat-operators