DOCSP-31894: fix href (#423)

(cherry picked from commit 4348785)

Author: Chris Cho

source/upgrade.txt

@@ -138,9 +138,9 @@ Version 4.0 Breaking Changes
   ``JAVA_LEGACY`` representation, the driver would decode binary objects
   of subtypes 3 and 4 as UUIDs. In version 4.0, the ``JAVA_LEGACY``
   representation works only with subtype 3.
-  
+
   For a list of members in the ``UuidRepresentation`` enum, see the
-  `API documentation. <https://http://mongodb.github.io/mongo-java-driver/4.0/apidocs/bson/org/bson/UuidRepresentation.html>`__
+  `v4.0 API documentation <https://mongodb.github.io/mongo-java-driver/4.0/apidocs/bson/org/bson/UuidRepresentation.html>`__.
 
 - The connection pool no longer restricts the number of wait queue threads
   or asynchronous tasks that require a connection to MongoDB. The