Spec file: bump bind version on f37+
    
    On fedora37+, require at least bind 9.18.7-1 to avoid
    dnssec regression (see BZ#2117342) related to bind and
    OpenSSL 3.0 engine support.
    
    Fixes: https://pagure.io/freeipa/issue/9216
    
    Signed-off-by: Florence Blanc-Renaud <flo@redhat.com>
    Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>