⬆️ Add Sphinx 9 support #672

Job	Run time
docs-build-format (man)	13s
docs-build-format (html)	12s
docs-build-format (latex)	12s
pre-commit	14s
Tests (py3.12, Sphinx~=9.0, on ubuntu-latest)	41s
Tests (py3.12, Sphinx~=7.0, on ubuntu-latest)	51s
Tests (py3.12, Sphinx~=8.0, on ubuntu-latest)	42s
Tests (py3.13, Sphinx~=7.0, on ubuntu-latest)	44s
Tests (py3.14, Sphinx~=8.0, on ubuntu-latest)	31s
Tests (py3.11, Sphinx~=7.0, on ubuntu-latest)	43s
Tests (py3.13, Sphinx~=8.0, on ubuntu-latest)	41s
Tests (py3.14, Sphinx~=9.0, on ubuntu-latest)	34s
Tests (py3.14, Sphinx~=7.0, on ubuntu-latest)	35s
Tests (py3.11, Sphinx~=9.0, on ubuntu-latest)	34s
Tests (py3.13, Sphinx~=8.0, on windows-latest)	1m 5s
Tests (py3.13, Sphinx~=9.0, on ubuntu-latest)	39s
Tests (py3.11, Sphinx~=7.0, on windows-latest)	1m 20s
Tests (py3.11, Sphinx~=8.0, on ubuntu-latest)	35s
Tests (py3.14, Sphinx~=9.0, on windows-latest)	1m 16s
check	2s
Publish to PyPi	0s
	12m 24s

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