[BUGFIX] Wrong reference to icon in EXT:taskcenter

The icon was moved with #61200

Resolves: #65298
Releases: master
Change-Id: I0326e2d496905d5e4edb4e842cdd67fb86967290
Reviewed-on: http://review.typo3.org/37206


Reviewed-by: Markus Klein <klein.t3@reelworx.at>
Tested-by: Markus Klein <klein.t3@reelworx.at>
Reviewed-by: Benjamin Mack <benni@typo3.org>
Tested-by: Benjamin Mack <benni@typo3.org>