DOCSP-22871 returnDocument option (#330)

* updated compound ops returnDocument option

Author: kyuan-mongodb

source/fundamentals/crud/compound-operations.txt

@@ -59,6 +59,6 @@ configurable :doc:`sort </fundamentals/crud/read-operations/sort>` and
 :doc:`projection </fundamentals/crud/read-operations/project>` options
 that work just like their read operation equivalents.
 ``findOneAndUpdate()`` and ``findOneAndDelete()`` allow the client to
-configure the ``returnOriginal``  option, a boolean that determines if
+configure the ``returnDocument``  option, a boolean that determines if
 the method returns the pre-update or post-update version of the modified
 document.

source/fundamentals/crud/write-operations/pkFactory.txt

@@ -1,8 +1,8 @@
 .. _node-pkfactory:
 
-=================================
+==================================
 Generate Custom Values for ``_id``
-=================================
+==================================
 
 .. default-domain:: mongodb