Update dependency phpunit/phpunit to ^9.6.21 #2069

Job	Run time
Generate job matrix	5s
Check Demo Scripts (locked, 8.1, ubuntu-latest)	12s
Check Demo Scripts (locked, 8.2, ubuntu-latest)	13s
QA Checks (README Linting [8.1, locked], ubuntu-latest, laminas/laminas-continuous-integration-ac...	21s
QA Checks (PHPUnit [8.1, locked], ubuntu-latest, laminas/laminas-continuous-integration-action@v1...	20s
QA Checks (PHPUnit [8.1, lowest], ubuntu-latest, laminas/laminas-continuous-integration-action@v1...	21s
QA Checks (PHPUnit [8.1, latest], ubuntu-latest, laminas/laminas-continuous-integration-action@v1...	22s
QA Checks (PHPUnit [8.2, lowest], ubuntu-latest, laminas/laminas-continuous-integration-action@v1...	22s
QA Checks (PHPUnit [8.2, latest], ubuntu-latest, laminas/laminas-continuous-integration-action@v1...	22s
QA Checks (PHPUnit [8.3, lowest], ubuntu-latest, laminas/laminas-continuous-integration-action@v1...	27s
QA Checks (PHPUnit [8.3, latest], ubuntu-latest, laminas/laminas-continuous-integration-action@v1...	21s
QA Checks (Infection [8.1, locked], ubuntu-latest, laminas/laminas-continuous-integration-action@...	32s
QA Checks (PHPCodeSniffer [8.1, locked], ubuntu-latest, laminas/laminas-continuous-integration-ac...	22s
QA Checks (Psalm [8.1, locked], ubuntu-latest, laminas/laminas-continuous-integration-action@v1, ...	35s
	4m 55s

Provide feedback