chore(deps): update actions/cache action to v4.2.0 #810

Job	Run time
test-directory-failure	6s
terraform-plan (changes, false)	8s
terraform-plan (no-changes, false)	8s
terraform-plan (format-error, true)	8s
terraform-plan (invalid, true)	7s
terraform-plan (conftest-deny, true)	19s
terraform-plan (skip-conftest, false, true)	8s
terraform-plan (skip-fmt, false, true)	11s
terraform-plan (skip-plan, false, true)	8s
terraform-plan (truncate-plan, false)	29s
terraform-plan (init-fail, true)	8s
terraform-plan (validate-fail, true)	8s
terraform-plan (import, true)	20s
terraform-plan (terragrunt, false, true)	20s
terraform-plan (init-run-all, false, true, true)	18s
test-action-comments	2s
	3m 8s

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