update v1.7.1 changelog (#10837)
update v1.7.1 changelog (#10837)


mitchellh/packer,rnaveiras/packer,hashicorp/packer,pecigonzalo/packer,pecigonzalo/packer,rnaveiras/packer,rnaveiras/packer,hashicorp/packer,mitchellh/packer,rnaveiras/packer,pecigonzalo/packer,pecigonzalo/packer,mitchellh/packer,rnaveiras/packer,hashicorp/packer,mitchellh/packer,hashicorp/packer,rnaveiras/packer,mitchellh/packer