Bump sphinx-design from 0.6.0 to 0.6.1 in /doc/rst (#8571)

Bumps [sphinx-design](https://github.com/executablebooks/sphinx-design) from 0.6.0 to 0.6.1.
- [Release notes](https://github.com/executablebooks/sphinx-design/releases)
- [Changelog](https://github.com/executablebooks/sphinx-design/blob/main/CHANGELOG.md)
- [Commits](executablebooks/sphinx-design@v0.6.0...v0.6.1)

---
updated-dependencies:
- dependency-name: sphinx-design
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

doc/rst/requirements.txt

@@ -6,7 +6,7 @@
 #
 sphinx_rtd_theme==2.0.0
 sphinx-copybutton==0.5.2
-sphinx-design==0.6.0
+sphinx-design==0.6.1
 sphinx-jinja==2.0.2
 sphinx-togglebutton==0.3.2
 sphinxcontrib-youtube==1.4.1