Update HCOVersion to 4.12.19

Author: cnv-bot-axuba

_attributes/common-attributes.adoc

@@ -107,7 +107,7 @@ endif::[]
 :VirtProductName: OpenShift Virtualization
 :VirtVersion: 4.12
 :KubeVirtVersion: v0.58.0
-:HCOVersion: 4.12.18
+:HCOVersion: 4.12.19
 :delete: image:delete.png[title="Delete"]
 ifdef::openshift-origin[]
 :VirtProductName: OKD Virtualization