[BUGFIX] Remove 2nd double quotes from exception messages

There were two double quotes within two exception messages.
That could lead to irritation whether one was part of header name
respectively the display condition string.

Resolves: #89583
Releases: master, 9.5
Change-Id: Idbe6efc296e1d064b14806fc248c2a23c9dadf24
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/62193


Tested-by: Oliver Bartsch <bo@cedev.de>
Tested-by: Daniel Siepmann <coding@daniel-siepmann.de>
Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: Benni Mack <benni@typo3.org>
Reviewed-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Daniel Siepmann <coding@daniel-siepmann.de>
Reviewed-by: Oliver Klee <typo3-coding@oliverklee.de>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Reviewed-by: Benni Mack <benni@typo3.org>