[BUGFIX] Use correct path to helper.js

Resolves: #102040
Related: #101790
Releases: main, 12.4
Change-Id: I7a6a21fd98d1a9506da864d983b1f40b03f4259e
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/81256


Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: core-ci <typo3@b13.com>
Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Reviewed-by: Benjamin Franzke <ben@bnf.dev>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Benjamin Franzke <ben@bnf.dev>