tests

ci: update python version used by coverage.yml on pr #5791

Job	Run time
integration tests (windows-latest, 3.10)	1m 55s
unit tests (3.10)	1m 6s
integration tests (macos-latest, 3.10)	2m 5s
integration tests (ubuntu-latest, 3.10)	1m 10s
integration tests (ubuntu-latest, 3.14)	1m 3s
unit tests (3.14)	1m 12s
integration tests (windows-latest, 3.14)	3m 27s
integration tests (macos-latest, 3.14)	1m 54s
	13m 52s

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