InstanceType default t3.small, was t2.nano
InstanceType default t3.small, was t2.nano

The newer t3 instance family is objectively better.
The small size (2 GiB RAM) is more realistic for actual workloads.

holmesjr/elastic-ci-stack-for-aws,buildkite/elastic-ci-stack-for-aws,holmesjr/elastic-ci-stack-for-aws