[BUGFIX] Use &quot; for quotes to make the HTML valid

Resolves: #63412

Change-Id: I6d7d85a29141f71e86e86c3e72bc078e69c4f67a
Reviewed-on: http://review.typo3.org/34882
Reviewed-by: Oliver Klee <typo3-coding@oliverklee.de>
Tested-by: Oliver Klee <typo3-coding@oliverklee.de>