Setting timezone to US/Central on Ubuntu 22.04 isn't idempotent with debconf 6.0.0

[stjeanp]

When I do this in site.pp, every catalog run applies the class, because (and I'm guessing here) debconf changes US/Central (which is a symlink) to America/Chicago (which is a file).

class { 'timezone':
timezone => 'US/Central'
}

When I change it to this, the catalog doesn't keep reapplying on every run:

class { 'timezone':
timezone => 'America/Chicago'
}