DOCSP-47275: Add note about UpdateOne sort functionality

Author: mcmorisi

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

@@ -90,6 +90,12 @@ Update documents use the following format:
 See the MongoDB server manual for a :manual:`complete list of update operators
 and descriptions </reference/operator/update-field/>`.
 
+.. tip::
+   
+   ``UpdateOne()`` updates the first document that matches the query filter
+   you provide. To ensure that you update the correct document, You can use the ``sort``
+   option to specify the order in which the operation finds documents.
+
 .. note:: Aggregation Pipelines in Update Operations
 
    If you are using MongoDB Server version 4.2 or later, you can use aggregation