[BUGFIX] Add missing image for workspace preview

Readd an image which has been removed during cleanups

Resolves: #82857
Releases: 7.6
Change-Id: Idd487fec1d35dc919099bcf9477860976d346d38
Reviewed-on: https://review.typo3.org/54477


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Andreas Fernandez <typo3@scripting-base.de>
Reviewed-by: Benni Mack <benni@typo3.org>
Tested-by: Benni Mack <benni@typo3.org>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>