Autoscaling group docs: make explicit waiting options
Autoscaling group docs: make explicit waiting options

Waiting options about load balancer status waiting are ambiguous. The
doc does not explicitely tell if terraform is waiting for any instance
in the load balancer to be healthy, or if it waits only for the helthy
state in the load balancer from the current group.

terraform-providers/terraform-provider-aws,kjmkznr/terraform-provider-aws,Ninir/terraform-provider-aws,kjmkznr/terraform-provider-aws,terraform-providers/terraform-provider-aws,Ninir/terraform-provider-aws,kjmkznr/terraform-provider-aws,Ninir/terraform-provider-aws,terraform-providers/terraform-provider-aws,kjmkznr/terraform-provider-aws,terraform-providers/terraform-provider-aws,Ninir/terraform-provider-aws