Update dependency Sphinx to v6.1.3

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
Sphinx (changelog)	==6.1.2 -> ==6.1.3

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Release Notes

sphinx-doc/sphinx

### [`v6.1.3`](https://togithub.com/sphinx-doc/sphinx/blob/HEAD/CHANGES#Release-613-released-Jan-10-2023) [Compare Source](https://togithub.com/sphinx-doc/sphinx/compare/v6.1.2...v6.1.3) \===================================== ## Bugs fixed - [#​11116](https://togithub.com/sphinx-doc/sphinx/issues/11116): Reverted to previous Sphinx 5 node copying method - [#​11117](https://togithub.com/sphinx-doc/sphinx/issues/11117): Reverted changes to parallel image processing from Sphinx 6.1.0 - [#​11119](https://togithub.com/sphinx-doc/sphinx/issues/11119): Supress `ValueError` in the `linkcheck` builder

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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 c750a3b7a86bf31ab2d28a8513888bce18b41f05 on renovate/sphinx-6.x into 5fa748064c3202b89dec4c2ad67d63ab13b72ede on develop.