Fix transport host setting

This commit fixes a reference to the transport.host setting which was
mistakenly identified as transport.tcp.host.

docs/reference/setup/bootstrap-checks.asciidoc

@@ -33,10 +33,9 @@ Elaticsearch instance to be in development mode if it does not bind
 transport to an external interface (the default), and is otherwise in
 production mode if it does bind transport to an external interface. Note
 that HTTP can be configured independently of transport via
-<<modules-http,`http.host`>> and
-<<modules-transport,`transport.tcp.host`>>; this can be useful for
-configuring a single instance to be reachable via HTTP for testing
-purposes without triggering production mode.
+<<modules-http,`http.host`>> and <<modules-transport,`transport.host`>>;
+this can be useful for configuring a single instance to be reachable via
+HTTP for testing purposes without triggering production mode.
 
 === Heap size check