Document CLI installation conflict with another package named duck

[padrepitufo]

The disclaimer for the duck cli installation needs a little more detail. It makes note :

You may get a conflict with another package named duck. As a workaround, install with a specific version number like sudo apt-get install duck=6.7.1.28683.

but upon attempting to do an upload with this version fails:

> root@40b0bdad7840:/opt/service/app# apt update
    $ Hit:1 https://s3.amazonaws.com/repo.deb.cyberduck.io nightly InRelease
    $ Hit:2 https://s3.amazonaws.com/repo.deb.cyberduck.io stable InRelease
    $ Hit:3 http://ports.ubuntu.com/ubuntu-ports jammy InRelease
    $ Hit:4 http://ports.ubuntu.com/ubuntu-ports jammy-updates InRelease
    $ Hit:5 http://ports.ubuntu.com/ubuntu-ports jammy-backports InRelease
    $ Hit:6 http://ports.ubuntu.com/ubuntu-ports jammy-security InRelease
    $ Hit:7 http://apt.postgresql.org/pub/repos/apt jammy-pgdg InRelease
    $ Reading package lists... Done
    $ Building dependency tree... Done
    $ Reading state information... Done
    $ All packages are up to date.
    $ W: https://s3.amazonaws.com/repo.deb.cyberduck.io/dists/nightly/InRelease: Key is stored in legacy     $ trusted.gpg keyring (/etc/apt/trusted.gpg), see the DEPRECATION section in apt-key(8) for details.
    $ W: https://s3.amazonaws.com/repo.deb.cyberduck.io/dists/stable/InRelease: Key is stored in legacy     $ trusted.gpg keyring (/etc/apt/trusted.gpg), see the DEPRECATION section in apt-key(8) for details.
> root@40b0bdad7840:/opt/service/app# apt install duck=6.7.1.28683
    $ Reading package lists... Done
    $ Building dependency tree... Done
    $ Reading state information... Done
    $ Package duck is not available, but is referred to by another package.
    $ This may mean that the package is missing, has been obsoleted, or
    $ is only available from another source

    $ E: Version '6.7.1.28683' for 'duck' was not found

It is not obvious to me where to find a valid version

CONTEXT:

this is running from within ubuntu 22.04

root@40b0bdad7840:/opt/service/app# lsb_release -a
No LSB modules are available.
Distributor ID:	Ubuntu
Description:	Ubuntu 22.04.3 LTS
Release:	22.04
Codename:	jammy