DOCSP-41726: acknowledgement error/result (#373)

* DOCSP-41726: acknowledgement error/result

* add example, MM PR fixes 1

* PV tech review comment

Author: rustagir

source/whats-new.txt

@@ -92,6 +92,24 @@ The 2.0 {+driver-short+} release includes the following improvements and fixes:
   contained the number of dropped indexes. See the
   :ref:`golang-remove-index` section of the Indexes guide to learn more.
 
+- The driver no longer supports the ``mongo.ErrUnacknowledgedWrite`` sentinel
+  error if a write operation is not acknowledged. To confirm that the server
+  acknowledged a write operation, you must access the ``Acknowledged``
+  property from the result struct returned by the write method.
+
+  The following example shows how to confirm acknowledgment of an insert
+  operation:
+
+  .. code-block:: go
+     :emphasize-lines: 6
+
+     res, err := coll.InsertOne(context.TODO(), bson.D{{"x", 2}})
+     if err != nil {
+     	panic(err)
+     }
+     
+     fmt.Print(res.Acknowledged)
+
 - You can set options for transactions run in a given session by
   creating a ``TransactionOptions`` instance and passing the instance to
   the ``SetDefaultTransactionOptions()`` method of the