docs mention nonexisting puppetserver subcommand

[bastelfreak]

Describe the Change You Would Like

From https://www.puppet.com/docs/puppet/7/config_file_oid_map :

Run puppetserver ca print to see changes made in custom_trusted_oid_mapping.yaml immediately without a restart.

But puppetserver ca print isn't a valid command.

[github-actions]

Migrated issue to PUPDOC-5626

[lisarobertson]

Docs have been updated and will be published with the next release.