[BUGFIX] Wrong 'default' in match expression

The match expression in PHP needs default as
keyword, not as string literal.

Change-Id: I8f242b47c74920034e046ce957cb5830d0584aa0
Resolves: #96794
Related: #96688
Releases: main
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/73362


Tested-by: core-ci <typo3@b13.com>
Tested-by: Nikita Hovratov <nikita.h@live.de>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Reviewed-by: Oliver Klee <typo3-coding@oliverklee.de>
Reviewed-by: Nikita Hovratov <nikita.h@live.de>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>