tests

ci: update python version used by coverage.yml on pr #5792

Job	Run time
unit tests (3.14)	1m 11s
unit tests (3.10)	1m 11s
integration tests (windows-latest, 3.14)	2m 14s
integration tests (macos-latest, 3.14)	1m 22s
integration tests (ubuntu-latest, 3.10)	1m 1s
integration tests (macos-latest, 3.10)	1m 59s
integration tests (ubuntu-latest, 3.14)	1m 0s
integration tests (windows-latest, 3.10)	2m 7s
	12m 5s

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