[BUGFIX] Add missing htmlspecialchars() in ActionTask

Add missing htmlspecialchars() calls in
EXT:sys_action/Classes/ActionTask.php

Resolves: #83359
Releases: master, 8.7
Change-Id: Ieda2612762b23783b17f6b4c93c9cfabc149fcb2
Reviewed-on: https://review.typo3.org/55119


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Joerg Boesche <typo3@joergboesche.de>
Reviewed-by: Michael Oehlhof <typo3@oehlhof.de>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Reviewed-by: Steffen Kamper <info@sk-typo3.de>
Reviewed-by: Oliver Klee <typo3-coding@oliverklee.de>
Reviewed-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>
Tested-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>