feat(horizon): Update Horizon to Bobcat (#695)

diff --git a/roles/defaults/vars/main.yml b/roles/defaults/vars/main.yml
index e5abcab..600dd8e 100644
--- a/roles/defaults/vars/main.yml
+++ b/roles/defaults/vars/main.yml
@@ -68,8 +68,8 @@
   heat_engine_cleaner: quay.io/vexxhost/heat@sha256:2413e1d669a899685d0cc89c3333222ad004c567be0d5ca605dcc6a59c12af64 # image-source: quay.io/vexxhost/heat:zed
   heat_engine: quay.io/vexxhost/heat@sha256:2413e1d669a899685d0cc89c3333222ad004c567be0d5ca605dcc6a59c12af64 # image-source: quay.io/vexxhost/heat:zed
   heat_purge_deleted: quay.io/vexxhost/heat@sha256:2413e1d669a899685d0cc89c3333222ad004c567be0d5ca605dcc6a59c12af64 # image-source: quay.io/vexxhost/heat:zed
-  horizon_db_sync: quay.io/vexxhost/horizon@sha256:6fa82cbcdf80b5bb89c7eb1a3053bc5efc71c36ab1c4f43ed18edbd17d5df602 # image-source: quay.io/vexxhost/horizon:zed
-  horizon: quay.io/vexxhost/horizon@sha256:6fa82cbcdf80b5bb89c7eb1a3053bc5efc71c36ab1c4f43ed18edbd17d5df602 # image-source: quay.io/vexxhost/horizon:zed
+  horizon_db_sync: quay.io/vexxhost/horizon@sha256:627d62e5b1675b9c129347da59916836aa7d34c02cff9f066944b687993aea1b # image-source: quay.io/vexxhost/horizon:2023.2
+  horizon: quay.io/vexxhost/horizon@sha256:627d62e5b1675b9c129347da59916836aa7d34c02cff9f066944b687993aea1b # image-source: quay.io/vexxhost/horizon:2023.2
   ingress_nginx_controller: registry.k8s.io/ingress-nginx/controller:v1.1.1@sha256:0bc88eb15f9e7f84e8e56c14fa5735aaa488b840983f87bd79b1054190e660de
   ingress_nginx_default_backend: registry.k8s.io/defaultbackend-amd64:1.5
   ingress_nginx_kube_webhook_certgen: registry.k8s.io/ingress-nginx/kube-webhook-certgen:v1.1.1@sha256:64d8c73dca984af206adf9d6d7e46aa550362b1d7a01f3a0a91b20cc67868660 # noqa: yaml[line-length]