It seems that the link in https://github.com/puppetlabs/pdk-templates/blob/main/README.md:
Use this README to understand the purpose, basic usage, and common configurable values for PDK templates. For further information about PDK, refer to our documentation site.
...should refer to https://help.puppet.com/pdk/current/topics/pdk.htm instead of https://www.puppet.com/docs/pdk/2.x/pdk.html.
It seems that the link in https://github.com/puppetlabs/pdk-templates/blob/main/README.md:
...should refer to https://help.puppet.com/pdk/current/topics/pdk.htm instead of https://www.puppet.com/docs/pdk/2.x/pdk.html.