[dependabot]

Updates the requirements on sphinx-autoapi to permit the latest version.

Release notes

Sourced from sphinx-autoapi's releases.

v3.9.0

Features

• Detect source file changes based on content hashing instead of modification time to support caching in CI environments. (#573)

Bugfixes

• Stop documenting code under if __name__ == "__main__". Only its first definition used to show up, now none of it does, as with autodoc. (#429)
• Fix autoapisummary showing only the return annotation of a function, in place of its arguments. (#531)
• Create directory symlinks used by the test suite at runtime so tests pass from source distributions. (#565)
• Fix infinite recursion when a nested class inherits from its enclosing class. (#571)

Improved Documentation

• Update the landing page grid layout so that the cards stack on narrow screens (#575)

Changelog

Sourced from sphinx-autoapi's changelog.

v3.9.0 (2026-10-30)

Features ^^^^^^^^

• Detect source file changes based on content hashing instead of modification time to support caching in CI environments. (#573)

Bugfixes ^^^^^^^^

• Stop documenting code under if __name__ == "__main__":. Only its first definition used to show up, now none of it does, as with autodoc. (#429)
• Fix autoapisummary showing only the return annotation of a function, in place of its arguments. (#531)
• Create directory symlinks used by the test suite at runtime so tests pass from source distributions. (#565)
• Fix infinite recursion when a nested class inherits from its enclosing class. (#571)

Improved Documentation ^^^^^^^^^^^^^^^^^^^^^^

• Update the landing page grid layout so that the cards stack on narrow screens (#575)

v3.8.1 (2026-08-23)

Bugfixes ^^^^^^^^

• Preserve ellipsis literals when rendering type annotations. (#562)

Improved Documentation ^^^^^^^^^^^^^^^^^^^^^^

• Document the autoapisummary directive. (#377)

Misc ^^^^

• #564
• Switch to tox.toml and reorganise repo structure

v3.8.0 (2026-03-07)

Features

... (truncated)

Commits

• 1b21959 Version 3.9.0
• 3756c4e Stop documenting code under an if name == "main" block
• 55625d6 docs: update changelog description
• c50ce50 feat: make content hashing the default behaviour
• 4c82e70 feat: add option for setting how file changes are detected
• 83d1205 Fix recursion when a nested class inherits from its enclosing class
• 667c8df Add test for nested class inheriting from its enclosing class
• efe4b59 Fix autoapisummary signatures of functions with a return annotation
• e8fd0f8 Add release note for grid layout update
• cd91429 Update grid layout from 2 to 1 2 2 2
• Additional commits viewable in compare view

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What changed in this PR

Updates the documentation build dependencies to require Sphinx AutoAPI 3.9.0 or newer.

Changes:

• Raises the sphinx-autoapi minimum version from 3.8.1 to 3.9.0, incorporating upstream content-hash change detection and API documentation fixes.

File	Description
doc/​requirements.txt	Raises the minimum Sphinx AutoAPI version for documentation builds.

_{Review effort: Balanced}