Update source/whats-new.txt

Co-authored-by: Rea Rustagi <[email protected]>

source/whats-new.txt

@@ -62,7 +62,7 @@ The 3.0 driver release includes the following new features:
 
 - The ``IMongoClient`` interface inherits the ``IDisposable`` interface. As a result, the
   ``MongoClient`` class and other classes that implement the ``IMongoClient`` interface
-  contain a ``Dispose()`` method. To learn more about this interface and use of the
+  contain a ``Dispose()`` method. To learn more about the ``IDisposable`` interface and how to use the
   ``Dispose()`` method, see
   `Dispose Pattern <https://learn.microsoft.com/en-us/dotnet/standard/design-guidelines/dispose-pattern>`__
   on MSDN.