change default python version for FreeBSD: 3.8
change default python version for FreeBSD: 3.8

Current python version for FreeBSD: 3.8
link: https://cgit.freebsd.org/ports/tree/Mk/bsd.default-versions.mk?h=2022Q1#n113

voxpupuli/puppet-rabbitmq,voxpupuli/puppet-rabbitmq