Bump sphinx-click from 5.2.2 to 6.0.0

Bumps [sphinx-click](https://github.com/click-contrib/sphinx-click) from 5.2.2 to 6.0.0.
- [Release notes](https://github.com/click-contrib/sphinx-click/releases)
- [Commits](https://github.com/click-contrib/sphinx-click/commits/6.0.0)

---
updated-dependencies:
- dependency-name: sphinx-click
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

requirements/docs.txt

@@ -1,7 +1,7 @@
 sphinx_celery>=2.1.1
 Sphinx>=7.0.0
 sphinx-testing~=1.0.1
-sphinx-click==5.2.2
+sphinx-click==6.0.0
 -r extras/sqlalchemy.txt
 -r test.txt
 -r deps/mock.txt