container_manifest.yaml missing link to reference

[michaelCTS]

deploymentmanager-samples/examples/v2/common/container_manifest.yaml

Line 16 in 56441d8

# https://cloud.google.com/compute/docs/containers/container_vms

This line points to a page that is not the reference documentation of container manifests. In fact, I couldn't find any specs for the container manifest anywhere and cannot guess which values are valid.