You can find the cluster configuration file reference documentation for an earlier version by adding the minor version number in the following URLs:
Admin cluster:
https:cloud.google.com/anthos/clusters/docs/on-prem/VERSION/how-to/admin-cluster-configuration-file
User cluster:
https:cloud.google.com/anthos/clusters/docs/on-prem/VERSION/how-to/user-cluster-configuration-file
Replace VERSION with a minor version from 1.0 to 1.16 and copy the URL to the address bar in your browser.