data/defaults: add apt-transport-https package
data/defaults: add apt-transport-https package

https:// repositories are now commonly used.

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