Update actions/checkout action to v4.3.0 (#1349) #5232

Job	Run time
Linting	23s
Node Tests (ubuntu-latest, 18.x)	17s
Node Tests (windows-latest, 22.x)	50s
Node Tests (ubuntu-latest, 20.x)	19s
Node Tests (ubuntu-latest, 22.x)	17s
Node Tests (windows-latest, 18.x)	56s
Node Tests (windows-latest, 20.x)	57s
Ember Tests Vite (ember-lts-4.4)	55s
Ember Tests Vite (ember-lts-4.12)	1m 5s
Ember Tests Vite (ember-release)	1m 5s
Ember Tests Vite (ember-canary)	1m 0s
Ember Tests Vite (ember-lts-3.28)	1m 7s
Ember Tests Vite (ember-lts-5.12)	1m 5s
Ember Tests Vite (ember-lts-5.4)	1m 5s
Ember Tests Vite (ember-lts-5.8)	1m 12s
Ember Tests Vite (ember-beta)	1m 1s
Ember Tests Classic (ember-lts-3.8)	48s
Ember Tests Classic (ember-lts-3.12)	44s
Ember Tests Classic (ember-lts-3.20)	58s
Ember Tests Classic (ember-lts-3.16)	58s
Ember Tests Classic (ember-lts-3.24)	54s
Ember Tests Classic (ember-lts-4.4)	58s
Ember Tests Classic (embroider-safe)	57s
Ember Tests Classic (embroider-optimized)	58s
Ember Tests Classic (ember-lts-3.28)	54s
Ember Tests Classic (ember-lts-4.12)	47s
	22m 30s

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