[blacksmith] Bump version to 1.2.3
[blacksmith] Bump version to 1.2.3

sd-robbruce/puppet-gitlab,sd-robbruce/puppet-gitlab,Bigluu/puppet-gitlab,icann-dns/puppet-gitlab,poikilotherm/puppet-gitlab,poikilotherm/puppet-gitlab,Bauer-Xcel-Media/puppet-gitlab,Bauer-Xcel-Media/puppet-gitlab,Bigluu/puppet-gitlab,vshn/puppet-gitlab,vshn/puppet-gitlab,npwalker/puppet-gitlab,npwalker/puppet-gitlab,icann-dns/puppet-gitlab