[BUGFIX] Fix typo in PageDoktypeProvider

Resolves: #99557
Releases: main
Change-Id: Idf145a98aa3fd386ff9906a4ee9cf5f0593fe8a3
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/77397


Tested-by: core-ci <typo3@b13.com>
Tested-by: Benni Mack <benni@typo3.org>
Reviewed-by: Oliver Bartsch <bo@cedev.de>
Tested-by: Oliver Bartsch <bo@cedev.de>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Oliver Hader <oliver.hader@typo3.org>
Reviewed-by: Benni Mack <benni@typo3.org>