Update existing entry on CHANGELOG
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mitchellh/packer,pecigonzalo/packer,ricardclau/packer,rnaveiras/packer,rnaveiras/packer,hashicorp/packer,mitchellh/packer,ricardclau/packer,ricardclau/packer,ricardclau/packer,hashicorp/packer,mitchellh/packer,rnaveiras/packer,ricardclau/packer,pecigonzalo/packer,pecigonzalo/packer,mitchellh/packer,rnaveiras/packer,rnaveiras/packer,hashicorp/packer,rnaveiras/packer,hashicorp/packer,pecigonzalo/packer,mitchellh/packer,ricardclau/packer