[BUGFIX] Drop undesired backslashes from Scheduler base tasks docs

Releases: master, 8.7, 7.6
Resolves: #84947
Change-Id: I4d81174497158b411c291ee51b331c1d3652e4a1
Reviewed-on: https://review.typo3.org/56887


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Mathias Schreiber <mathias.schreiber@typo3.com>
Tested-by: Mathias Schreiber <mathias.schreiber@typo3.com>
Reviewed-by: Tymoteusz Motylewski <t.motylewski@gmail.com>
Tested-by: Tymoteusz Motylewski <t.motylewski@gmail.com>