Fix code sample in `AddArrayFunctionClosureParamTypeRector` #29968

Job	Run time
Commented Code	24s
Preload php-parser Order	17s
Composer Validate	20s
PHPStan	1m 19s
Run with Space in Directory	24s
Active Classes	22s
Detect composer dependency issues	21s
Compatible PHPStan versions	20s
Check before/after test fixture on no-changes	20s
Finalize classes	17s
Check no "*.php" files in rules Fixture directory	17s
Help and Version	22s
	5m 3s

Provide feedback