Update actions/checkout action to v4 #1470

Job	Run time
Generate job matrix	10s
Composer Require Checker (locked, 8.3, ubuntu-latest)	52s
Check Backwards Compatibility (locked, 8.1, ubuntu-latest)	22s
Check Backwards Compatibility (locked, 8.2, ubuntu-latest)	16s
Check Backwards Compatibility (locked, 8.3, ubuntu-latest)	36s
QA Checks (README Linting [8.1, locked], ubuntu-latest, laminas/laminas-continuous-integration-ac...	24s
QA Checks (PHPUnit [8.1, locked], ubuntu-latest, laminas/laminas-continuous-integration-action@v1...	30s
QA Checks (PHPUnit [8.1, lowest], ubuntu-latest, laminas/laminas-continuous-integration-action@v1...	27s
QA Checks (PHPUnit [8.1, latest], ubuntu-latest, laminas/laminas-continuous-integration-action@v1...	30s
QA Checks (PHPUnit [8.2, lowest], ubuntu-latest, laminas/laminas-continuous-integration-action@v1...	25s
QA Checks (PHPUnit [8.2, latest], ubuntu-latest, laminas/laminas-continuous-integration-action@v1...	26s
QA Checks (PHPUnit [8.3, lowest], ubuntu-latest, laminas/laminas-continuous-integration-action@v1...	31s
QA Checks (PHPUnit [8.3, latest], ubuntu-latest, laminas/laminas-continuous-integration-action@v1...	25s
QA Checks (Infection [8.1, locked], ubuntu-latest, laminas/laminas-continuous-integration-action@...	2m 0s
QA Checks (PHPCodeSniffer [8.1, locked], ubuntu-latest, laminas/laminas-continuous-integration-ac...	27s
QA Checks (Psalm [8.1, locked], ubuntu-latest, laminas/laminas-continuous-integration-action@v1, ...	30s
	8m 51s

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