[BUGFIX] Use correct constant for email templateName in felogin

Releases: master
Resolves: #91337
Relates: #90729
Change-Id: I564f488dd653448046599a9bb1099dd05c4211f7
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/64432


Reviewed-by: Daniel Goerz <daniel.goerz@posteo.de>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Alexander Grein <alexander.grein@gmail.com>
Reviewed-by: Josef Glatz <josefglatz@gmail.com>
Reviewed-by: Guido Schmechel <guido.schmechel@brandung.de>
Reviewed-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Benjamin Franzke <bfr@qbus.de>
Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Alexander Grein <alexander.grein@gmail.com>
Tested-by: Benjamin Franzke <bfr@qbus.de>