Update install-mongodb-on-windows.txt

Author: dcoupal

source/tutorial/install-mongodb-on-windows.txt

@@ -94,7 +94,7 @@ You can set up the MongoDB server as a :guilabel:`Windows Service` that
 starts automatically at boot time.
 
 The following procedure assumes you have installed MongoDB Community using the
-``.msi`` installer with the path ``C:\Program Files\MongoDB\Server\3.4\``.
+``.msi`` installer with the path ``C:\Program Files\MongoDB\Server\3.6\``.
 
 If you have installed in an alternative directory, you will need to
 adjust the paths as appropriate.