Fix typo

Source/domainset/cdn.conf

@@ -2861,7 +2861,7 @@ assets.ecomm.ui.com
 cdn.ecomm.ui.com
 static-secure-uploads.ui.com
 files.svc.ui.com
-uos-support-files.svc.ui.com/
+uos-support-files.svc.ui.com
 # StatusPage hosted on CloudFront
 status.ui.com