Bump codecov/codecov-action from 5.0.7 to 5.1.2 #422

Job	Run time
mypy	3m 51s
py3.13 \| macos \| integration tests	18m 38s
py3.13 \| ubuntu \| integration tests	17m 15s
py3.13 \| macos \| unit tests	8m 23s
py3.13 \| windows \| integration tests	31m 5s
py3.13 \| ubuntu \| unit tests	13m 20s
py3.13 \| windows \| unit tests	22m 36s
py3.10 \| ubuntu \| integration tests	17m 55s
py3.10 \| ubuntu \| unit tests	12m 37s
py3.11 \| ubuntu \| unit tests	12m 40s
py3.12 \| ubuntu \| unit tests	13m 45s
merge-test-artifacts	6s
	2h 52m 11s

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