[BUGFIX] Old TYPO3 logo still in use in ext:workspaces

Replace old logo with the new logo.

Resolves: #59321
Releases: 6.2
Change-Id: I1b4386e0ee614096b4033f00d9fe9136d11a63c7
Reviewed-on: https://review.typo3.org/30548
Reviewed-by: Wouter Wolters
Tested-by: Wouter Wolters