Update dependency phpunit/phpunit to v9.6.33 [SECURITY] #24353

Job	Run time
Compiler Tests	2m 1s
Download base SHA PHAR	20s
extension-tests / Check PHAR checksum	5s
integration-tests / Check PHAR checksum	6s
other-tests / Check PHAR checksum	6s
Commit PHAR	-1s
other-tests / Other Tests	0s
extension-tests / ${{ matrix.extension-name }} (${{ matrix.php-version }}) ${{ matrix.script }}	0s
integration-tests / PMMP Tests	-1s
integration-tests / Integration - ${{ matrix.repo }}	-1s
integration-tests / Integration - ${{ matrix.name }}	-1s
integration-tests / Integration - Update baselines	0s
Checksum PHAR	4s
PHAR Prefix Diff	26s
	3m 4s

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