trivial: amt: Adjust to use [] instead of () in device name
trivial: amt: Adjust to use [] instead of () in device name

This makes it more friendly to bash completion

superm1/fwupd,hughsie/fwupd,superm1/fwupd,vathpela/fwupd,hughsie/fwupd,hughsie/fwupd,fwupd/fwupd,vathpela/fwupd,superm1/fwupd,hughsie/fwupd,vathpela/fwupd,fwupd/fwupd,vathpela/fwupd,fwupd/fwupd,fwupd/fwupd