v2.1+ client bw link in parallelism note

Author: rustagir

source/fundamentals/transactions.txt

@@ -160,6 +160,14 @@ options, then creates a session with these options:
 
 .. sharedinclude:: dbx/transactions-parallelism.rst
 
+   .. replacement:: driver-specific-content
+
+      If your application is connected to {+mdb-server+} v8.0 or later,
+      you can perform write operations on multiple namespaces within a
+      single transaction by using the client bulk write feature. To
+      learn more, see the :ref:`golang-bulk-client` section of the Bulk
+      Operations guide.
+
 Example
 -------
 
@@ -211,4 +219,4 @@ guide, see the following API Documentation:
 - `StartSession() <{+api+}/mongo#Client.StartSession>`__
 - `TransactionOptions <{+api+}/mongo/options#TransactionOptions>`__
 - `SetWriteConcern() <{+api+}/mongo/options#TransactionOptionsBuilder.SetWriteConcern>`__
-- `InsertMany() <{+api+}/mongo#Collection.InsertMany>`__
+- `InsertMany() <{+api+}/mongo#Collection.InsertMany>`__