swarm-ui: link the secret store's web UI from swarm.bao.ui.domain

The swarm-controller adds a Bao quick link built from
services.hyperhive.swarm.bao.ui.domain, so the popover links the
store's browser UI whichever host runs bao.

Refs #4885

nix/module-eval/swarm-services-switch.nix

@@ -116,8 +116,8 @@ let
       Metrics = s.victoriametrics.domain;
       Logs = s.victorialogs.domain;
       Matrix = s.matrix.gatewayHost;
+      Bao = s.bao.ui.domain;
       # forge: added once hive-forge/default.nix drops its per-host link
-      # bao: its web UI at `swarm.bao.ui.domain` has no link yet
     };
   swarmServiceLinksOf =
     cfg: