I found out on that the supported URL on this question must be change instead point that on
It should be https://docs.aws.amazon.com/vpc/latest/userguide/VPC_Subnets.html
"Given a VPC CIDR of 10.0.0.0/16 and subnet CIDR block of 10.0.0.0/24, what would you expect the DNS address to be for DHCP clients in that subnet given default settings?"
Thanks Babon for pointing this out. I’ve corrected the URL and just pushed an update that should go in within a few days.