fix openstack cdn service update unit test
diff --git a/openstack/cdn/v1/services/requests_test.go b/openstack/cdn/v1/services/requests_test.go
index 6ace1ec..c5a0405 100644
--- a/openstack/cdn/v1/services/requests_test.go
+++ b/openstack/cdn/v1/services/requests_test.go
@@ -312,7 +312,7 @@
 		Append{
 			Value: DomainList{
 				Domain{
-					Domain: "added.mocksite4.com",
+					Domain: "appended.mocksite4.com",
 				},
 			},
 		},