Remove spurious space ` ` in RPM-GPG-KEY-fedora-37-primary
    
    gpg accepts this, whereas librpm's bespoke PGP code does not.
    I didn't look at the specification but I doubt it allows extra
    whitespace.
    
    dnf uses the gpg APIs to import and canonicalize keys before passing
    them to librpm.  gpg happily accepts the extra whitespace.
    
    librpm has a bespoke PGP parser which rejects this.
    
    Fixes https://github.com/rpm-software-management/libdnf/issues/1320