data/defaults.yaml: Add munin0.internal.softwareheritge.org
data/defaults.yaml: Add munin0.internal.softwareheritge.org

SoftwareHeritage/puppet-swh-site,SoftwareHeritage/puppet-swh-site,SoftwareHeritage/puppet-swh-site,SoftwareHeritage/puppet-swh-site,SoftwareHeritage/puppet-swh-site