fix

Author: norareidy

source/fundamentals/transactions.txt

@@ -163,7 +163,7 @@ to find an example that shows how to manually create and commit a transaction.
 
    .. replacement:: driver-specific-content
 
-      If you're using {+mdb-server+} v8.0 or later, you can perform
+      If you're using {+server+} v8.0 or later, you can perform
       write operations on multiple namespaces within a single transaction by using
       bulk write operations. For more information, see the :ref:`<rust-bulk-guide>`
       guide.