Spec file: bump krb5_kdb_version on rawhide
    
    fedora 38 now uses krb5 1.20.1 which provides
    krb5_kdb_version 9.0 instead of 8.0
    
    Signed-off-by: Florence Blanc-Renaud <flo@redhat.com>
    Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>