[BUGFIX] Correct locallang reference in irre_tutorial

Resolves: #95050
Releases: master, 10.4
Change-Id: I6e837617ec291812684ce6d481d84e2be635655f
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/70833


Tested-by: core-ci <typo3@b13.com>
Tested-by: Benni Mack <benni@typo3.org>
Tested-by: Jochen <rothjochen@gmail.com>
Tested-by: Tymoteusz Motylewski <t.motylewski@gmail.com>
Reviewed-by: Benni Mack <benni@typo3.org>
Reviewed-by: Jochen <rothjochen@gmail.com>
Reviewed-by: Tymoteusz Motylewski <t.motylewski@gmail.com>