Update sphinx-design[furo] requirement in /requirements (#48)

Updates the requirements on [sphinx-design[furo]](https://github.com/executablebooks/sphinx-design) to permit the latest version.
- [Release notes](https://github.com/executablebooks/sphinx-design/releases)
- [Changelog](https://github.com/executablebooks/sphinx-design/blob/main/CHANGELOG.md)
- [Commits](executablebooks/sphinx-design@v0.5.0...v0.6.0)

---
updated-dependencies:
- dependency-name: sphinx-design[furo]
  dependency-type: direct:production
...

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

Author: dependabot[bot]

requirements/docs.txt

@@ -3,6 +3,6 @@ sphinx~=7.3.7
 sphinx-copybutton~=0.5.2
 furo==2024.8.6
 enum-tools[sphinx]~=0.12.0
-sphinx-design[furo]~=0.5.0
+sphinx-design[furo]~=0.6.0
 readthedocs-sphinx-search~=0.3.2
 sphinxcontrib-svg2pdfconverter~=1.2.2