revises bash tip to reflect proper command

scripts/use-hubs-cloud-stack.sh

@@ -6,7 +6,7 @@ SHORTLINK_ZONE_NAME=$3
 INTERNAL_ZONE_NAME=$4
 
 if [[ -z "$STACK_NAME" || -z "$EXTERNAL_ZONE_NAME" || -z "$SHORTLINK_ZONE_NAME" || -z "$INTERNAL_ZONE_NAME" ]] ; then 
-  echo -e "Usage: scripts/use-hubs-cloud-stack.sh <stack-name> <domain> <internal-domain>
+  echo -e "Usage: scripts/use-hubs-cloud-stack.sh <stack-name> <domain> <short-link-domain> <internal-domain>
 
 Switches your local client to connect to a remote Hubs Cloud instance by modifying .env.defaults.