CLI: correctly override DocGuide.virtual_hosts path segment

Closes #7716

(cherry picked from commit 94cae1d)
(cherry picked from commit 34d6206)
(cherry picked from commit e633367)

Author: michaelklishin

deps/rabbitmq_cli/lib/rabbitmq/cli/core/doc_guide.ex

@@ -64,6 +64,6 @@ defmodule RabbitMQ.CLI.Core.DocGuide do
   Macros.defguide("runtime_tuning", path_segment: "runtime")
   Macros.defguide("tls", path_segment: "ssl")
   Macros.defguide("troubleshooting")
-  Macros.defguide("virtual_hosts", path_segments: "vhosts")
+  Macros.defguide("virtual_hosts", path_segment: "vhosts")
   Macros.defguide("upgrade")
 end