Widen pytest version upper bound to accept v9.x (#473) #1047

Job	Run time
Build distribution packages	15s
Test with nox (arm, ubuntu-24.04, 3.11, pytest_min)	6m 36s
Test with nox (amd64, ubuntu-24.04, 3.12, pytest_min)	5m 58s
Test with nox (arm, ubuntu-24.04, 3.12, pytest_min)	6m 21s
Test with nox (arm, ubuntu-24.04, 3.12, ci_checks_max)	7m 5s
Test with nox (amd64, ubuntu-24.04, 3.12, ci_checks_max)	6m 37s
Test with nox (arm, ubuntu-24.04, 3.11, ci_checks_max)	7m 10s
Test with nox (amd64, ubuntu-24.04, 3.11, pytest_min)	6m 11s
Test with nox (amd64, ubuntu-24.04, 3.11, ci_checks_max)	6m 30s
Test documentation website generation	0s
Test package installation (amd64, ubuntu-24.04, 3.11)	12s
Test package installation (amd64, ubuntu-24.04, 3.12)	14s
Test package installation (arm, ubuntu-24.04, 3.12)	20s
Test package installation (arm, ubuntu-24.04, 3.11)	25s
Test package installation	3s
Test with nox	3s
Publish documentation website to GitHub pages	31s
Create GitHub release	9s
Publish packages to PyPI	16s
	54m 56s

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