Summary
The documentation is outdated and does not use the `kn-workflow quarkus` commands. Update the documentation and also the version of KN CLI plugin workflow to use.

Also:
The documentation mentions that `kn workflow build` should support flag `--verbose`, which should display the build command's output. It is not possible the command with the flag (e.g. `kn workflow build --image dev.local/serverless-workflow-hello-world --verbose`) and an error is thrown `unknown flag: --verbose`. The command runs just fine without the flag.
In a different part of the documentation where the output of running `kn workflow` is discussed, flag `verbose` is also mentioned. It looks like it was accidentally confused with flag `version`, the actual output.
This is an outdated flag -> removed from the tool -> remove it from documentation.