Fix typo in mongo.txt

Author: degvalentine

source/reference/mongo.txt

@@ -143,13 +143,13 @@ non-standard port, use the following form:
 
 .. code-block:: sh
 
-   mogno --username <user> --password <pass> --hostname <host> --port 28015
+   mongo --username <user> --password <pass> --hostname <host> --port 28015
 
 Alternatively, consider the following short form:
 
 .. code-block:: sh
 
-   mogno -u <user> -p <pass> --host <host> --port 28015
+   mongo -u <user> -p <pass> --host <host> --port 28015
 
 Replace ``<user>``, ``<pass>``, and ``<host>`` with the appropriate
 values for your situation and substitute or omit the :option:`--port`