bug#59463: [doc] More foolproof command in https://guix.gnu.org/cookbook/en/html_node/Reproducible-profiles.html

[pelzflorian (Florian Pelz)]

Thanks for reporting in time for the 1.4.0 release of the cookbook. :)
Fixed in 39f88ee29faa98d0b9b9761f2db8dc7721200fe5.

Regards,
Florian