workflows: bump codecov/codecov-action from 3.1.5 to 4.0.2 #170

Job	Run time
PR - GO lint	2m 49s
PR - Actionlint	5s
PR - Markdownlint	12s
PR - Hadolint	5s
PR - Reusable workflow linting	3s
PR - Shellcheck	3s
	3m 17s

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