update puppet-systemd upper bound to 8.0.0 #295

Job	Run time
Puppet / Static validations	20s
Puppet / 8 (Ruby 3.2)	40s
Puppet / 7 (Ruby 2.7)	53s
Puppet / Distro Puppet - Archlinux rolling	1m 13s
Puppet / Puppet 8 - CentOS 8	7m 57s
Puppet / Puppet 7 - CentOS 8	7m 3s
Puppet / Puppet 8 - Ubuntu 20.04	7m 6s
Puppet / Puppet 7 - Ubuntu 20.04	7m 18s
Puppet / Puppet 8 - Ubuntu 22.04	7m 0s
Puppet / Puppet 7 - Ubuntu 22.04	6m 42s
Puppet / Puppet 8 - Debian 11	6m 15s
Puppet / Puppet 7 - Debian 11	6m 9s
Puppet / Puppet 8 - AlmaLinux 8	6m 38s
Puppet / Puppet 7 - AlmaLinux 8	7m 19s
Puppet / Puppet 8 - Rocky 8	6m 47s
Puppet / Puppet 7 - Rocky 8	6m 41s
Puppet / Test suite	1s
	1h 26m 2s

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