chore(deps-dev): bump sphinx-click from 2.5.0 to 2.6.0

Bumps [sphinx-click](https://github.com/stephenfin/sphinx-click) from 2.5.0 to 2.6.0.
- [Release notes](https://github.com/stephenfin/sphinx-click/releases)
- [Commits](click-contrib/sphinx-click@2.5.0...2.6.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

dev-requirements.txt

@@ -8,7 +8,7 @@ Sphinx==3.5.1
 sphinx-bootstrap-theme==0.7.1
 sphinxcontrib-fulltoc==1.2.0
 sphinxcontrib-websupport==1.2.4
-sphinx-click==2.5.0
+sphinx-click==2.6.0
 recommonmark==0.7.1
 twine==3.3.0
 click>=7.0