Update CHANGELOG.md
Update CHANGELOG.md

rnaveiras/packer,ricardclau/packer,mitchellh/packer,rnaveiras/packer,ricardclau/packer,paulmey/packer,grubernaut/packer,pecigonzalo/packer,pecigonzalo/packer,mitchellh/packer,paulmey/packer,grubernaut/packer,pecigonzalo/packer,ricardclau/packer,ricardclau/packer,paulmey/packer,paulmey/packer,rnaveiras/packer,hashicorp/packer,pecigonzalo/packer,ricardclau/packer,rnaveiras/packer,ricardclau/packer,paulmey/packer,mitchellh/packer,rnaveiras/packer,grubernaut/packer,grubernaut/packer,rnaveiras/packer,hashicorp/packer,grubernaut/packer,paulmey/packer,hashicorp/packer,grubernaut/packer,hashicorp/packer,mitchellh/packer,mitchellh/packer