Update actions/checkout action to v4 #1413

Job	Run time
Check Backwards Compatibility (locked, 8.1, ubuntu-latest)	21s
Check Backwards Compatibility (locked, 8.2, ubuntu-latest)	20s
Generate job matrix	8s
Check Backwards Compatibility (locked, 8.3, ubuntu-latest)	44s
Composer Require Checker (locked, 8.1, ubuntu-latest)	10s
Composer Require Checker (locked, 8.2, ubuntu-latest)	10s
Composer Require Checker (locked, 8.3, ubuntu-latest)	11s
QA Checks (PHPUnit [8.1, locked], ubuntu-latest, laminas/laminas-continuous-integration-action@v1...	59s
QA Checks (PHPUnit [8.1, lowest], ubuntu-latest, laminas/laminas-continuous-integration-action@v1...	1m 4s
QA Checks (PHPUnit [8.1, latest], ubuntu-latest, laminas/laminas-continuous-integration-action@v1...	1m 0s
QA Checks (PHPUnit [8.2, lowest], ubuntu-latest, laminas/laminas-continuous-integration-action@v1...	29s
QA Checks (PHPUnit [8.2, latest], ubuntu-latest, laminas/laminas-continuous-integration-action@v1...	28s
QA Checks (PHPUnit [8.3, lowest], ubuntu-latest, laminas/laminas-continuous-integration-action@v1...	1m 1s
QA Checks (PHPUnit [8.3, latest], ubuntu-latest, laminas/laminas-continuous-integration-action@v1...	1m 25s
QA Checks (Infection [8.1, locked], ubuntu-latest, laminas/laminas-continuous-integration-action@...	2m 33s
QA Checks (PHPCodeSniffer [8.1, locked], ubuntu-latest, laminas/laminas-continuous-integration-ac...	56s
QA Checks (Psalm [8.1, locked], ubuntu-latest, laminas/laminas-continuous-integration-action@v1, ...	1m 15s
	13m 14s

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