Update dependency Sphinx to v7.1.1

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
Sphinx (changelog)	==7.1.0 -> ==7.1.1

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Release Notes

sphinx-doc/sphinx (Sphinx)

### [`v7.1.1`](https://togithub.com/sphinx-doc/sphinx/blob/HEAD/CHANGES#Release-711-released-Jul-27-2023) [Compare Source](https://togithub.com/sphinx-doc/sphinx/compare/v7.1.0...v7.1.1) \===================================== ## Bugs fixed - [#​11514](https://togithub.com/sphinx-doc/sphinx/issues/11514): Fix `SOURCE_DATE_EPOCH` in multi-line copyright footer. Patch by Bénédikt Tran.

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Configuration

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This PR has been generated by Mend Renovate. View repository job log here.

[coveralls]

coverage: 88.669%. remained the same when pulling 260f97baabd373b5474ab8549e81a9c2d1a75630 on renovate/sphinx-7.x into e9c24643297678fd4911a7ea78be65f8af8143a6 on develop.