Try to fix unclosed resources. #2869

Job	Run time
build (ubuntu-latest, 3.9)	2m 55s
build (ubuntu-latest, 3.13)	2m 55s
build (windows-latest, 3.9)	9m 13s
build (windows-latest, 3.13)	8m 14s
check_release	1m 50s
build (macos-latest, 3.9)	4m 45s
test_docs	51s
build (macos-latest, 3.13)	4m 48s
Test Lint	1m 1s
build (ubuntu-latest, pypy-3.9)	5m 27s
build (macos-latest, 3.10)	4m 26s
link_check	3m 15s
build (ubuntu-latest, 3.11)	3m 3s
build (ubuntu-latest, 3.12)	3m 19s
Make SDist	25s
Test Minimum Versions	2m 19s
Test Prereleases	2m 2s
test_without_debugpy (ubuntu-latest, 3.9)	2m 0s
Install from SDist and Test	2m 0s
coverage	0s
tests_check	2s
	1h 4m 50s

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