DOCSP-16570 fix typo in 4.2 changelog

Author: andf-mongodb

source/includes/extracts-4.2-changes.yaml

@@ -805,15 +805,14 @@ content: |
 
    Starting in MongoDB 4.2,
    
-   - Replace document operations, such as
-     :method:`db.collection.replaceOne()` or :ref:`db.collection.update(
-     query, replacement, ... ) <update-behavior-replacement-document>`,
-     attempt to target a single shard, first by using the query filter. If the
-     operation cannot target a single shard by the query filter, it then
-     attempts to target by the replacement document.
-
-     In earlier versions, the operation attempts to target using the
-     replacement document.
+   - Operations which replace documents, such as
+     :method:`~db.collection.replaceOne()` or
+     :method:`~db.collection.update()` (when used with a replacement
+     document), will first attempt to target a single shard by using the
+     query filter. If the operation cannot target a single shard by the
+     query filter, it then attempts to target by the replacement
+     document. In earlier versions, these operations only attempt to
+     target using the replacement document.
 
    - The :method:`~db.collection.save()` method is deprecated: use the
      :method:`~db.collection.insertOne()` or