Bump sphinx from 8.2.3 to 9.0.0 in /docs/readthedocs

[dependabot]

Bumps sphinx from 8.2.3 to 9.0.0.

Release notes

Sourced from sphinx's releases.

Sphinx 9.0.0

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

Dependencies

• #13786: Support Docutils 0.22. Patch by Adam Turner.

Incompatible changes

• #13639: SphinxComponentRegistry.create_source_parser no longer has an app parameter, instead taking config and env. Patch by Adam Turner.
• #13679: Non-decodable characters in source files now raise an error. Such bytes have been replaced with '?' along with logging a warning since Sphinx 2.0. Patch by Adam Turner.
• #13751, #14089: sphinx.ext.autodoc has been substantially rewritten, and there may be some incompatible changes in edge cases, especially when extensions interact with autodoc internals. The autodoc_use_legacy_class_based option has been added to use the legacy (pre-9.0) implementation of autodoc. Patches by Adam Turner.
• #13355: Don't include escaped title content in the search index. Patch by Will Lachance.

Deprecated

• 13627: Deprecate remaining public app attributes, including builder.app, env.app, events.app, and SphinxTransform.app. Patch by Adam Turner.
• #13637: Deprecate the set_application method of Parser objects. Patch by Adam Turner.
• #13644: Deprecate the Parser.config and env attributes. Patch by Adam Turner.
• #13665: Deprecate support for non-UTF 8 source encodings, scheduled for removal in Sphinx 10. Patch by Adam Turner.
• #13682: Deprecate sphinx.io. Sphinx no longer uses the sphinx.io classes, having replaced them with standard Python I/O. The entire sphinx.io module will be removed in Sphinx 10. Patch by Adam Turner.
• #13631: sphinx.environment.adapters.toctree.global_toctree_for_doc and sphinx.environment.BuildEnvironment.get_and_resolve_doctree

... (truncated)

Changelog

Sourced from sphinx's changelog.

Release 9.0.0 (released Nov 30, 2025)

Dependencies

• #13786: Support Docutils 0.22_. Patch by Adam Turner.

  .. _Docutils 0.22: https://docutils.sourceforge.io/RELEASE-NOTES.html#release-0-22-2026-07-29

Incompatible changes

• #13639: :py:meth:!SphinxComponentRegistry.create_source_parser no longer has an app parameter, instead taking config and env. Patch by Adam Turner.
• #13679: Non-decodable characters in source files now raise an error. Such bytes have been replaced with '?' along with logging a warning since Sphinx 2.0. Patch by Adam Turner.
• #13751, #14089: :mod:sphinx.ext.autodoc has been substantially rewritten, and there may be some incompatible changes in edge cases, especially when extensions interact with autodoc internals. The :confval:autodoc_use_legacy_class_based option has been added to use the legacy (pre-9.0) implementation of autodoc. Patches by Adam Turner.
• #13355: Don't include escaped title content in the search index. Patch by Will Lachance.

Deprecated

• 13627: Deprecate remaining public :py:attr:!.app attributes, including builder.app, env.app, events.app, and SphinxTransform.app. Patch by Adam Turner.
• #13637: Deprecate the :py:meth:!set_application method of :py:class:~sphinx.parsers.Parser objects. Patch by Adam Turner.
• #13644: Deprecate the :py:attr:!Parser.config and :py:attr:!env attributes. Patch by Adam Turner.
• #13665: Deprecate support for non-UTF 8 source encodings, scheduled for removal in Sphinx 10. Patch by Adam Turner.
• #13682: Deprecate :py:mod:!sphinx.io. Sphinx no longer uses the :py:mod:!sphinx.io classes, having replaced them with standard Python I/O. The entire :py:mod:!sphinx.io module will be removed in Sphinx 10. Patch by Adam Turner.
• #13631: :func:!sphinx.environment.adapters.toctree.global_toctree_for_doc

... (truncated)

Commits

• aea90c9 Bump to 9.0.0 final
• 28c31aa Fix CHANGES entry for non-decodable bytes
• a22dfab Permit filtering warnings generated during source code parsing (#13894)
• 2d0a416 Fix intersphinx file cache (#14130)
• 3cd545f Bump version
• 17380a5 Bump to 9.0.0 candidate 4
• 4a3bd13 js domain: Remove extra brackets from function arguments and errors (#13569)
• 4f23c99 Fix .gitattributes for latin-1 encoded files
• 766976f Run the ty type checker in CI (#14129)
• 2ac430c Fix autodoc event handler in sphinx.ext.napoleon (#14127)
• Additional commits viewable in compare view

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[dependabot]

Superseded by #409.