DOCSP-1491: deprecate isolated and snapshot options

Author: kay-kim

source/release-notes/3.6-compatibility.txt

@@ -442,6 +442,21 @@ index keys.
 To delete existing indexes named ``*``, delete the index before
 upgrading. To rename them, delete and recreate the index.
 
+.. _3.6-deprecated-options:
+
+Deprecated Options
+~~~~~~~~~~~~~~~~~~
+
+.. versionchanged:: 3.6.1
+
+- MongoDB 3.6.1 deprecates the ``snapshot`` query option. You can use
+  :method:`~cursor.hint()` on the ``{ _id: 1}`` index instead to
+  prevent a cursor from returning a document more than once if an
+  intervening write operation results in a move of the document.
+
+- MongoDB 3.6.1 deprecates the ``$isolated`` option. For more
+  information on read isolation, see
+  :doc:`/core/read-isolation-consistency-recency`.
 
 .. _3.6-compatibility-enabled: