[BUGFIX] Fix invalid placeholder in exception message

The message of the ContentRenderingException must use %s
as correct placeholder.

Resolves: #75035
Releases: master, 7.6
Change-Id: Ie78997ead81fc308a4002cffca8dfa0a99b50ac2
Reviewed-on: https://review.typo3.org/47232


Reviewed-by: Dennis Römmich <dennis.roemmich@sunzinet.com>
Tested-by: Dennis Römmich <dennis.roemmich@sunzinet.com>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Reviewed-by: Markus Klein <markus.klein@typo3.org>
Tested-by: Markus Klein <markus.klein@typo3.org>