docs(alb): ALB requires region to use logging (#5085)

* Add comment about requiring region to use logging

* Update application-load-balancer.ts

Co-authored-by: Rico Huijbers <rix0rrr@gmail.com>

packages/@aws-cdk/aws-elasticloadbalancingv2/lib/alb/application-load-balancer.ts

@@ -79,7 +79,10 @@ export class ApplicationLoadBalancer extends BaseLoadBalancer implements IApplic
   }
 
   /**
-   * Enable access logging for this load balancer
+   * Enable access logging for this load balancer.
+   *
+   * A region must be specified on the stack containing the load balancer; you cannot enable logging on
+   * environment-agnostic stacks. See https://docs.aws.amazon.com/cdk/latest/guide/environments.html
    */
   public logAccessLogs(bucket: s3.IBucket, prefix?: string) {
     this.setAttribute('access_logs.s3.enabled', 'true');