[DOCS] Adjust example in changelog for tree node status information

The example has been adjusted to give an example how this feature
can use for setting the new status information: with a PSR-14 event
listener.

Additionally, use named arguments in the example for tree node labels
for instantiating the DTO.

Resolves: #103276
Related: #103186
Releases: main
Change-Id: I4441f58041ef6cfe0571e591e97b8d8374b39d4b
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/83205


Reviewed-by: Garvin Hicking <gh@faktor-e.de>
Tested-by: Benjamin Franzke <ben@bnf.dev>
Tested-by: core-ci <typo3@b13.com>
Reviewed-by: Benjamin Franzke <ben@bnf.dev>
Tested-by: Garvin Hicking <gh@faktor-e.de>