trivial: Allow the uset to set the ApprovalRequired remote value
trivial: Allow the uset to set the ApprovalRequired remote value

This allows the local user with appropriate permissions to do:

    fwupdmgr modify-remote lvfs ApprovalRequired true

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