081622: update builder link and link description (#261)

Author: Chris Cho

source/fundamentals/builders/aggregates.txt

@@ -549,8 +549,8 @@ on a specified span of documents in a collection.
 
 .. tip:: Window Functions
 
-   The driver includes the `WindowedComputations <{+api+}/apidocs/mongodb-driver-core/com/mongodb/client/model/WindowedComputations.html>`__
-   class with static factory methods for each of the supported window operators.
+   The driver includes the `Windows <{+api+}/apidocs/mongodb-driver-core/com/mongodb/client/model/Windows.html>`__
+   class with static factory methods for building windowed computations.
 
 The following example creates a pipeline stage that computes the
 accumulated rainfall and the average temperature over the past month for