Bump sphinx, furo, black

Bumps the python-packages group with 3 updates: [sphinx](https://github.com/sphinx-doc/sphinx), [furo](https://github.com/pradyunsg/furo) and [black](https://github.com/psf/black).


Updates `sphinx` from 7.2.5 to 7.2.6
- [Release notes](https://github.com/sphinx-doc/sphinx/releases)
- [Changelog](https://github.com/sphinx-doc/sphinx/blob/master/CHANGES.rst)
- [Commits](https://github.com/sphinx-doc/sphinx/compare/v7.2.5...v7.2.6)

Updates `furo` from 2023.8.19 to 2023.9.10
- [Release notes](https://github.com/pradyunsg/furo/releases)
- [Changelog](https://github.com/pradyunsg/furo/blob/main/docs/changelog.md)
- [Commits](https://github.com/pradyunsg/furo/compare/2023.08.19...2023.09.10)

Updates `black` from 23.7.0 to 23.9.1
- [Release notes](https://github.com/psf/black/releases)
- [Changelog](https://github.com/psf/black/blob/main/CHANGES.md)
- [Commits](https://github.com/psf/black/compare/23.7.0...23.9.1)

---
updated-dependencies:
- dependency-name: sphinx
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: python-packages
- dependency-name: furo
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: python-packages
- dependency-name: black
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: python-packages
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

setup.py

@@ -69,8 +69,8 @@ setup(
     setup_requires=["pytest-runner"],
     extras_require={
         "docs": [
-            "Sphinx==7.2.5",
-            "furo==2023.8.19",
+            "Sphinx==7.2.6",
+            "furo==2023.9.10",
             "sphinx-autobuild",
             "codespell>=2.2.5",
             "blacken-docs",
@@ -83,7 +83,7 @@ setup(
             "pytest-xdist>=2.2.1",
             "pytest-asyncio>=0.17",
             "beautifulsoup4>=4.8.1",
-            "black==23.7.0",
+            "black==23.9.1",
             "blacken-docs==1.16.0",
             "pytest-timeout>=1.4.2",
             "trustme>=0.7",