[BUGFIX] Fix broken impexp functional test

Issue #58484 fixed the inclusion of CSS classes
in typolinks, but did not adjust the tests.
Update the affected fixture data.

Resolves: #58503
Releases: 6.2
Change-Id: I511847bda3e393f104f1f141fb3a0bed4a97c1b1
Reviewed-on: https://review.typo3.org/29854
Reviewed-by: Marc Bastian Heinrichs
Tested-by: Marc Bastian Heinrichs