Readded dependency to rubygem-ruby-augeas again.
Even if puppet does not have a dependency to it, it breaks usage for user which should not happen for patches.

The dep was removed here:
https://svnweb.freebsd.org/ports/head/sysutils/puppet6/Makefile?r1=558467&r2=558466&pathrev=558467

Puppet7 does not have the dep, so users can plan the migration.

PR: 252339
Reported by: Eirik Oeverby <ltning-freebsd@anduin.net>