Bump furo from 2024.5.6 to 2024.7.18 in /docs

Bumps [furo](https://github.com/pradyunsg/furo) from 2024.5.6 to 2024.7.18.
- [Release notes](https://github.com/pradyunsg/furo/releases)
- [Changelog](https://github.com/pradyunsg/furo/blob/main/docs/changelog.md)
- [Commits](pradyunsg/furo@2024.05.06...2024.07.18)

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

Signed-off-by: dependabot[bot] <[email protected]>

docs/requirements.txt

@@ -1,4 +1,4 @@
-furo==2024.5.6
+furo==2024.7.18
 sphinx==7.3.7
 numpydoc==1.7.0
 sphinx_toolbox