DOCSP-1623: add 4th change stream example for node

Author: skerschb

source/tutorial/change-streams-example.txt

@@ -347,6 +347,17 @@ more of the following pipeline stages when configuring the change stream:
 
             MongoCursor<Document> cursor = collection.watch(pipeline).iterator();
 
+
+     - id: nodejs
+       content: |
+         .. class:: copyable-code
+
+         .. literalinclude:: /driver-examples/ChangeStreamNodeExamples.js
+            :language: javascript
+            :dedent: 0
+            :start-after: Start Changestream Example 4
+            :end-before: End Changestream Example 4
+
 .. tabs-drivers::
 
    tabs: