(DOCS-14716): Use mongosh in replica set tutorial (#1056)

* (DOCS-14716): Use mongosh in replica set tutorial

* wording

* wording

Author: jeff-allen-mongo

source/includes/steps-deploy-replica-set.yaml

@@ -89,11 +89,14 @@ pre: |
 action:
   language: sh
   code: |
-    mongo
+    mongosh
 post: |
 
   Depending on your path, you may need to specify the path to the
   :binary:`~bin.mongosh` binary.
+
+  If your ``mongod`` is not running on the default port, specify the
+  :option:`--port <mongosh --port>` option for ``mongosh``.
 ---
 title: "Initiate the replica set."
 level: 4