Add RHEL 9 UI branding patch reference
    
    The UI in RHEL has a different set of logos and different
    background colors. Some direct adjustments were made that
    are not buildable so apply them as a patch.
    
    https://pagure.io/freeipa/issue/8669
    
    Signed-off-by: Rob Crittenden <rcritten@redhat.com>
    Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>