Changes to support Bookworm /boot structure break systems still on Bullseye

[RanchoHam]

In main.yml:

    - name: Ensure cgroups are configured correctly in ubuntuEnv.txt.
      ansible.builtin.replace:
        path: /boot/firmware/ubuntuEnv.txt

The path has been changed to be compatible with the Bookworm release of Debian. This breaks Debian Bullseye systems.

A pull request is forthcoming addressing this issue for Debian systems. I suspect that the same issue holds true for earlier Ubuntu systems, but I don't have a cluster running Ubuntu Bullseye to test on.