Bump sphinx from 5.1.1 to 5.2.3 in /requirements

[dependabot]

Bumps sphinx from 5.1.1 to 5.2.3.

Release notes

Sourced from sphinx's releases.

v5.2.3

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

v5.2.2

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

v5.2.1

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

v5.2.0

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

Changelog

Sourced from sphinx's changelog.

Release 5.2.3 (released Sep 30, 2022)

• #10878: Fix base64 image embedding in sphinx.ext.imgmath
• #10886: Add :nocontentsentry: flag and global domain table of contents entry control option. Patch by Adam Turner

Release 5.2.2 (released Sep 27, 2022)

• #10872: Restore link targets for autodoc modules to the top of content. Patch by Dominic Davis-Foster.

Release 5.2.1 (released Sep 25, 2022)

Bugs fixed

• #10861: Always normalise the pycon3 lexer to pycon.
• Fix using sphinx.ext.autosummary with modules containing titles in the module-level docstring.

Release 5.2.0.post0 (released Sep 24, 2022)

• Recreated source tarballs for Debian maintainers.

Release 5.2.0 (released Sep 24, 2022)

Dependencies

• #10356: Sphinx now uses declarative metadata with pyproject.toml to create packages, using PyPA's flit project as a build backend. Patch by Adam Turner.

Deprecated

• #10843: Support for HTML 4 output. Patch by Adam Turner.

Features added

• #10738: napoleon: Add support for docstring types using 'of', like type of type. Example: tuple of int.
• #10286: C++, support requires clauses not just between the template parameter lists and the declaration.

... (truncated)

Commits

• cbb19d6 Bump to 5.2.3 final
• 650f63b Finer grained control over domain ToC entries (#10886)
• 6627618 imgmath: Fix embed mode (#10878)
• a651e6b Bump to 5.2.2 final
• 335f335 Restore anchor links to top of module docstring
• 19c2783 Correct error in release date for Sphinx 5.2.1
• 635540c Restore anchor links to top of module docstring
• 89b4f14 Fix mypy violations for v0.981 (#10875)
• e0dbbc5 Bump to 5.2.1 final
• 15c1cba Fix error in changelog for Sphinx 5.2.0
• Additional commits viewable in compare view

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