[BUGFIX] Fix spelling errors in ext:scheduler

Resolves: #90588
Releases: master
Change-Id: I771186e77f0c78661d1f310f53b1d9085123d2c5
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/63494


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Björn Jacob <bjoern.jacob@tritum.de>
Tested-by: Oliver Bartsch <bo@cedev.de>
Tested-by: Susanne Moog <look@susi.dev>
Reviewed-by: Björn Jacob <bjoern.jacob@tritum.de>
Reviewed-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Susanne Moog <look@susi.dev>