TST: Update matrix #134

Job	Run time
tests (Code style checks, ubuntu-latest, 3.x, codestyle)	57s
tests (ubuntu-latest, 3.7, py37-test-sphinx40)	1m 21s
tests (ubuntu-latest, 3.8, py38-test-sphinx53)	2m 11s
tests (ubuntu-latest, 3.9, py39-test-sphinx62)	1m 13s
tests (ubuntu-latest, 3.10, py310-test-sphinx70)	1m 24s
tests (ubuntu-latest, 3.11, py311-test-sphinx71-cov-clocale)	2m 3s
tests (ubuntu-latest, 3.12-dev, py312-test-sphinxdev)	1m 40s
tests (macos-latest, 3.10, py310-test-sphinx71-clocale)	4m 52s
tests (macos-latest, 3.11, py311-test-sphinxdev)	7m 22s
tests (windows-latest, 3.7, py37-test-sphinx40)	5m 33s
tests (windows-latest, 3.10, py310-test-sphinx71)	2m 33s
tests (windows-latest, 3.11, py311-test-sphinxdev)	2m 35s
	33m 44s

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