pin fluentd for loki logs

Author: msherman64

site-config/globals.yml

@@ -95,3 +95,4 @@ keystone_image_full: ghcr.io/chameleoncloud/kolla/keystone:2023.1-ubuntu-jammy
 keystone_fernet_image_full: ghcr.io/chameleoncloud/kolla/keystone-fernet:2023.1-ubuntu-jammy
 keystone_ssh_image_full: ghcr.io/chameleoncloud/kolla/keystone-ssh:2023.1-ubuntu-jammy
 horizon_image_full: ghcr.io/chameleoncloud/kolla/horizon:2023.1-ubuntu-jammy
+fluentd_image_full: ghcr.io/chameleoncloud/kolla/horizon:2023.1-ubuntu-jammy