Bump codecov/codecov-action from 5.0.7 to 5.1.2 #423

Job	Run time
mypy	3m 47s
py3.13 \| macos \| unit tests	8m 16s
py3.13 \| ubuntu \| unit tests	13m 9s
py3.13 \| macos \| integration tests	14m 43s
py3.13 \| windows \| unit tests	17m 52s
py3.13 \| ubuntu \| integration tests	17m 31s
py3.13 \| windows \| integration tests	29m 49s
py3.10 \| ubuntu \| integration tests	17m 25s
py3.10 \| ubuntu \| unit tests	12m 47s
py3.11 \| ubuntu \| unit tests	13m 15s
py3.12 \| ubuntu \| unit tests	13m 25s
merge-test-artifacts	2s
	2h 42m 1s

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