Bump actions/checkout from 4 to 6 #1644

Job	Run time
Set CI/CD metadata	8s
Commit stage / Check file format	6s
Commit stage / Scan secrets	7s
Commit stage / Check TODO usage	7s
Commit stage / Detect Terraform Changes	4s
Commit stage / Count lines of code	6s
Commit stage / Check for changes to event schema package compared to main branch	4s
Commit stage / Check English usage	6s
Commit stage / Scan dependencies	25s
Commit stage / Check Markdown format	4s
Commit stage / Run terraform-docs	0s
Commit stage / Trivy Scan	0s
Commit stage / Lint Terraform	0s
Commit stage / Check event schema version has been updated	-1s
Test stage / Check generated dependencies	41s
Test stage / Unit tests	2m 39s
Test stage / Typecheck	44s
Test stage / Linting	45s
Test stage / Perform static analysis	5s
Test stage / Test coverage	3s
Build stage / Build SDKs	1m 35s
Build stage / Build Docs	1m 36s
Build stage / Create Dynamic Environment	5s
Build stage / Build proxies	0s
Publish stage	-1s
Acceptance stage	-1s
	9m 27s

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