Merge pull request #30517 from hongkailiu/OCPBUGS-65896

NO-JIRA: Add exception for co/authentication on scaling test

Author: openshift-merge-bot[bot]

test/extended/machines/scale.go

@@ -239,6 +239,8 @@ var _ = g.Describe("[sig-cluster-lifecycle][Feature:Machines][Serial] Managed cl
 
 		except := func(co string) string {
 			switch co {
+			case "authentication":
+				return "https://issues.redhat.com/browse/OCPBUGS-65896"
 			case "dns":
 				return "https://issues.redhat.com/browse/OCPBUGS-62623"
 			case "image-registry":