build(deps): bump actions/checkout from 4 to 6 (#1900) #5738

Job	Run time
Check autogenerated code is in sync (3.12, 20)	44s
mypy	37s
lint	25s
docs-build	49s
E2E Py 3.12 K8s v1.27.11 DB db	8m 7s
E2E Py 3.12 K8s v1.27.11 DB postgres	19m 49s
E2E Py 3.12 K8s v1.29.2 DB db	20m 6s
E2E Py 3.12 K8s v1.30.6 DB db	22m 53s
E2E Py 3.12 K8s v1.28.7 DB db	23m 2s
E2E Py 3.12 K8s v1.30.6 DB postgres	20m 15s
E2E Py 3.12 K8s v1.29.2 DB postgres	22m 18s
E2E Py 3.12 K8s v1.28.7 DB postgres	22m 35s
E2E Py 3.9 K8s v1.27.11 DB db	21m 54s
E2E Py 3.10 K8s v1.27.11 DB db	21m 3s
E2E Py 3.11 K8s v1.27.11 DB db	23m 15s
E2E Py 3.12 K8s v1.31.0 DB postgres	22m 9s
E2E Py 3.12 K8s v1.31.0 DB db	23m 25s
	4h 33m 26s

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