Fixes showing files changed in JSON formatter #32103

Job	Run time
Detect composer dependency issues	18s
Run with Space in Directory	17s
Check no "*.php" files in rules Fixture directory	15s
Preload php-parser Order	20s
Compatible PHPStan versions	21s
Check fixture classes are different to nodes	16s
PHPStan	59s
PHP Linter	31s
Commented Code	17s
Finalize classes	16s
Avoid duplicate short class names	19s
Active Classes	19s
Composer Validate	17s
Help and Version	20s
Check before/after test fixture on no-changes	16s
	5m 21s

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