DOCS-16342 Deprecates minNumChunksForSessionsCollection (#4661)

* DOCS-16342 deprecate minNumChunksForSessionsCollection

* internal review feedback

* external review feedback

Author: jmd-mongo

source/release-notes/7.1-compatibility.txt

@@ -30,6 +30,30 @@ MongoDB. To downgrade from MongoDB 7.1 to an earlier version, you must
 remove or resize the collection. To learn how to resize a capped collection, 
 see :ref:`resize-capped-collection`.
 
+Deprecated Parameters
+---------------------
+
+MongoDB 7.1 deprecates the following server parameters:
+
+.. list-table::
+   :widths: 20 80
+   :header-rows: 1
+
+   * - Deprecated
+
+     - Description
+
+   * - ``minNumChunksForSessionsCollection``
+
+     - *Deprecated in version 7.1.*
+
+       MongoDB 7.1 deprecates the ``minNumChunksForSessionsCollection`` 
+       server parameter. Starting in MongoDB 7.1. the 
+       ``config.system.sessions`` collection is no longer presplitted 
+       during balancing rounds. You cannot use 
+       ``minNumChunksForSessionsCollection`` to guarantee a minimum 
+       number of chunks for that collection.
+
 General Changes
 ---------------