link fix

Author: rustagir

source/whats-new.txt

@@ -29,9 +29,9 @@ What's New in 5.4
 The 5.4 driver release includes the following changes, fixes,
 and features:
 
-- Adds ``BsonConfiguration`` support for bson-kotlinx snake case conversion
+- Adds ``BsonConfiguration`` support to ``bson-kotlinx`` for snake case conversion
   during serialization. To learn more, see the
-  :ref:`kotlin-sync-serialization-snake-case-eg` on the Serialization page.
+  :ref:`kotlin-sync-serialization-snake-case-eg` section of the Serialization guide.
 
 .. sharedinclude:: dbx/jvm/v5.4-wn-items.rst