Bump furo from 2023.8.19 to 2023.9.10 (#419)

Bumps [furo](https://github.com/pradyunsg/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](pradyunsg/furo@2023.08.19...2023.09.10)

---
updated-dependencies:
- dependency-name: furo
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

requirements/docs.txt

@@ -1,5 +1,5 @@
 -r main.txt
-furo==2023.8.19
+furo==2023.9.10
 Sphinx>4,<8
 sphinx-autobuild==2021.3.14
 sphinx-copybutton==0.5.2