trivial: Update fuzzing instructions to not use libcurl
trivial: Update fuzzing instructions to not use libcurl

fwupd/fwupd,fwupd/fwupd,fwupd/fwupd,hughsie/fwupd,hughsie/fwupd,hughsie/fwupd,hughsie/fwupd,fwupd/fwupd