[DOCS] Fix minor typo in UserTSconfig Changelog

Releases: main
Resolves: #103431
Change-Id: I640fa48610e85bccf43929cafd31cd0158a1a679
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/83527
Tested-by: Garvin Hicking <gh@faktor-e.de>
Tested-by: Benni Mack <benni@typo3.org>
Reviewed-by: Garvin Hicking <gh@faktor-e.de>
Tested-by: core-ci <typo3@b13.com>
Reviewed-by: Benni Mack <benni@typo3.org>

typo3/sysext/core/Documentation/Changelog/13.0/Feature-101807-AutomaticInclusionOfUserTSconfigOfExtensions.rst

@@ -28,7 +28,7 @@ Impact
 When a file is created, the user TSconfig is loaded automatically without a
 custom registration, cached within the Core caches, and more
 performant than the existing registration format. The old registration
-format has been been marked as deprecated, see
+format has been marked as deprecated, see
 :ref:`Deprecated ExtensionManagementUtility::addUserTSConfig() <deprecation-101807-1693474000>`
 for more details.