Fix CHANGELOG

Author: fabpot

CHANGELOG.md

@@ -7,11 +7,7 @@ CHANGELOG
 * Add a new `markAsPublic` method on `NotificationEmail` to change the `importance` context option to null after creation
 * Add a new `fragment_uri()` helper to generate the URI of a fragment
 * Add support of Bootstrap 5 for form theming
-
-5.3.0
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-
-* Added a new `serialize` filter to serialize objects using the Serializer component
+* Add a new `serialize` filter to serialize objects using the Serializer component
 
 5.2.0
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