chore(deps): update dependency sphinx to v7.3.7

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
sphinx (changelog)	==7.3.6 -> ==7.3.7

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Release Notes

sphinx-doc/sphinx (sphinx)

### [`v7.3.7`](https://togithub.com/sphinx-doc/sphinx/blob/HEAD/CHANGES.rst#Release-737-released-Apr-19-2024) [Compare Source](https://togithub.com/sphinx-doc/sphinx/compare/v7.3.6...v7.3.7) \===================================== ## Bugs fixed - [#​12299](https://togithub.com/sphinx-doc/sphinx/issues/12299): Defer loading themes defined via entry points until their explicit use by the user or a child theme. Patch by Adam Turner. - [#​12305](https://togithub.com/sphinx-doc/sphinx/issues/12305): Return the default value for `theme.get_config()` with an unsupported theme configuration section. Patch by Adam Turner.

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Configuration

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