spec file: bump sssd version
    
    Bump sssd version to 2.8.0 on fedora37+ and RHEL
    to ensure the fix for SSSD #6631 is present.
    
    No need to bump the version on fedora 36 as the issue
    is not seen on versions < 37.
    
    Fixes: https://pagure.io/freeipa/issue/9234
    Signed-off-by: Florence Blanc-Renaud <flo@redhat.com>
    Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>