fix: Typo in README (#258)

Author: melzareix

typescript/ecs/cross-stack-load-balancer/README.md

@@ -18,8 +18,8 @@ Shown in `split-at-listener.ts`, create an `ApplicationLoadBalancer`
 in a shared stack, and an `ApplicationListener` in the service stack.
 
 
-Option 1: Split at target group
+Option 2: Split at target group
 -------------------------------
 
 Shown in `split-at-targetgroup.ts`, create an empty `TargetGroup` in the load
-balancer stack, and register a `Service` into it in the service stack.
+balancer stack, and register a `Service` into it in the service stack.