[DOCS] Fix rendering of Events in the docu

Fixed the display of pseudocode to simple rest as these get
displayed in TYPO3 Explained. This resolves rendering
warnings and incorrect code display

Releases: main, 11.5
Resolves: #98305
Change-Id: Iafe32a55722ee0ad475f0f4b562aef548e47a7be
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/75639


Tested-by: core-ci <typo3@b13.com>
Tested-by: Lina Wolf <112@linawolf.de>
Reviewed-by: Lina Wolf <112@linawolf.de>