Attached is a patch that updates the manual sections `Invoking guix challenge` and `Invoking guix archive`.  The update involves changing a command in both sections to one that I verified worked as part of my submission of `guix challenge` diffs for bug#34597.  The commands that are replaces did not work for me.  There is also a cross reference added to the `Invoking guix challenge` in the relevant part of `Invoking guix archive`.