chore(deps): bump actions/checkout from 3 to 4 #736

Job	Run time
deployment-test / test-prepare	5s
verify / markdown-lint	11s
verify / verify-formatting	1m 24s
deployment-test / secret-presence	2s
verify / verify-helm-docs	14s
verify / verify-license-headers	3s
verify / verify-dependencies / Dash-Verify-Licenses	1m 44s
verify / verify-dependencies / Review-Allowed-Licenses	8s
deployment-test / test-in-memory	3m 12s
deployment-test / test-azure-vault-postgres	0s
deployment-test / test-hashicorp-postgres	5m 27s
verify / api-tests	2m 26s
verify / dataplane-tests	2m 16s
verify / integration-tests	2m 3s
verify / end-to-end-tests	4m 36s
verify / miw-integration-tests	3m 19s
verify / postgres-tests	7m 28s
verify / unit-tests	3m 53s
summary	1s
	38m 32s

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