fix(deps): update dependency sphinx to v6

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
Sphinx (changelog)	5.3.0 → 6.2.1
sphinx (changelog)	==5.3.0 → ==6.2.1

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Release Notes

sphinx-doc/sphinx (Sphinx)

v6.2.1

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Changelog: https://www.sphinx-doc.org/en/master/changes.html

v6.2.0

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Changelog: https://www.sphinx-doc.org/en/master/changes.html

v6.1.3

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Changelog: https://www.sphinx-doc.org/en/master/changes.html

v6.1.2

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Changelog: https://www.sphinx-doc.org/en/master/changes.html

v6.1.1

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Changelog: https://www.sphinx-doc.org/en/master/changes.html

v6.1.0

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Changelog: https://www.sphinx-doc.org/en/master/changes.html

v6.0.1

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Changelog: https://www.sphinx-doc.org/en/master/changes.html

v6.0.0

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Changelog: https://www.sphinx-doc.org/en/master/changes.html

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