bug#47634: Accompany .asc and .DIGESTS keys for the ISO

[bo0od]

This is nicely written by Qubes documentation:

https://www.qubes-os.org/security/verifying-signatures/

Leo Famulari:
> On Wed, Apr 07, 2021 at 05:42:40AM +0000, bo0od wrote:
> > Hi There,
> >
> > I see there is only .sig provided:
> >
> > https://guix.gnu.org/en/download/
> >
> > Its better to provide more than one way of verification e.g:
>
> Why?