minor #28281 [Serializer] Update changelog about the new $encoderIgno…

…redNodeTypes arg in XmlEncoder contrustor (maidmaid)

This PR was merged into the 4.2-dev branch.

Discussion
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[Serializer] Update changelog about the new $encoderIgnoredNodeTypes arg in XmlEncoder contrustor

| Q             | A
| ------------- | ---
| Branch?       | master
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #27926
| License       | MIT
| Doc PR        | /

Commits
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49f3bfc Update changelog

src/Symfony/Component/Serializer/CHANGELOG.md

@@ -6,6 +6,8 @@ CHANGELOG
 
 * `AbstractNormalizer::handleCircularReference` is now final, and receives two optional extra arguments: the format and the context
 * added support for XML comment encoding (encoding `['#comment' => ' foo ']` results `<!-- foo -->`)
+* added optional `int[] $encoderIgnoredNodeTypes` argument to `XmlEncoder::__construct` to configure node types to be
+  ignored during encoding.
 
 4.1.0
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