Bump codecov/codecov-action from 4 to 5 (#275) #687

Job	Run time
pytest-real backend	1m 39s
pytest (linux-py3.9)	37s
pytest (windows-py3.9)	1m 30s
pytest (linux-py3.10)	50s
pytest (windows-py3.10)	2m 12s
pytest (linux-py3.11)	35s
pytest (windows-py3.11)	2m 24s
pytest (linux-py3.12)	44s
pytest (windows-py3.12)	2m 4s
External / Run `pre-commit`	0s
External / Build distribution package	13s
External / Build Documentation	1m 2s
External / Run `pylint` & `safety`	59s
	14m 49s

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