Update changelog

CHANGELOG.md

@@ -1,6 +1,10 @@
 CHANGELOG
 =========
 
+4.25.3
+-----
+* Calling `DocumentationExtension::getExtendedType()` has been deprecated in favor of `DocumentationExtension::getExtendedTypes()` to align with the deprecation introduced with `symfony/symfony` version `4.2`.
+
 4.25.0
 -----
 * Added support for [JMS @Discriminator](https://jmsyst.com/libs/serializer/master/reference/annotations#discriminator) annotation/attribute
@@ -124,6 +128,11 @@ doc-api:
 4.17.0
 -----
 * Passing groups to `PropertyDescriberInterface::describe()` via the `$groups` parameter is deprecated, the parameter will get removed in a future version. Pass groups via `$context['groups']` instead.
+* `UndocumentedArrayItemsException::class` has been marked as deprecated and will be removed in a future version.
+
+4.15.0
+-----
+* Passing `null` to the `$schema` parameter of `PropertyDescriberInterface::describe()` is deprecated. In future versions, the `$schema` parameter will be made non-nullable and will require a `OA\Schema` instance.
 
 4.0.0
 -----