bug#69998: [PATCH guile-web] libraries: Use guile-gnunet’s real name.

Hi.

I too noticed that "guix" is displayed with the description of
"guile-gnunet", so they appear to be mixed into a single entry.

And I found similar older issue with the "guile-email" package:

https://debbugs.gnu.org/cgi/bugreport.cgi?bug=49064

So it might also need a special case.