Update CHANGELOG to add previously_new_record?

activerecord/CHANGELOG.md

+*   Add `ActiveRecord::Base#previously_new_record?` to show if a record was new before the last save.
+
+    *Tom Ward*
+
 *   Allow generated `create_table` migrations to include or skip timestamps.
 
-     *Michael Duchemin*
+    *Michael Duchemin*
 
 Please check [6-0-stable](https://github.com/rails/rails/blob/6-0-stable/activerecord/CHANGELOG.md) for previous changes.