docs: name the swarm display name by its new path

Two sites spelled it as a brace group, services.hyperhive.{hiveName,
swarmName}, which no anchored rewrite can handle correctly now that only
one of the two moves; both are written out separately. One of them is an
MCP tool description, so it is rendered into every agent's system prompt.

hive-agent-mcp/src/mcp/mod.rs

@@ -437,8 +437,9 @@ impl AgentServer {
         `status_set_at` are stale pre-stop values and should not be treated as live), \
         and the target's self-reported `status` text (set via `set_status`) plus how \
         long ago it was set. Also returns the hive + swarm display names (`hive_name`, \
-        `swarm_name`) when the operator has configured `services.hyperhive.{hiveName, \
-        swarmName}`; both lines omitted when unset. Pass `name` to query a peer (e.g. \
+        `swarm_name`) when the operator has configured \
+        `services.hyperhive.hiveName` / `services.hyperhive.swarm.name`; both lines \
+        omitted when unset. Pass `name` to query a peer (e.g. \
         check whether iris is idle before pinging them); omit `name` to get your own \
         identity stamp — handy for state files / commit messages / cross-agent \
         attribution that won't drift across renames or session-continue boundaries \