DOCSP-28755 Adds data type to countDocuments() (#3236) (#4185)

Author: kennethdyer

source/reference/method/db.collection.countDocuments.txt

@@ -20,9 +20,9 @@ Definition
       command
    .. include:: /includes/fact-mongosh-shell-method-alt
 
-   Returns the count of documents that match the query for a collection
-   or view.  This method is
-   available for use in :doc:`/core/transactions`.
+   Returns an integer for the number of documents that match the query 
+   of the collection or view.  This method is available for use in 
+   :ref:`transactions`.
 
    .. code-block:: javascript