Bump sphinx-toolbox from 4.1.2 to 4.2.0

Bumps [sphinx-toolbox](https://github.com/sphinx-toolbox/sphinx-toolbox) from 4.1.2 to 4.2.0.
- [Release notes](https://github.com/sphinx-toolbox/sphinx-toolbox/releases)
- [Changelog](https://github.com/sphinx-toolbox/sphinx-toolbox/blob/master/doc-source/changelog.rst)
- [Commits](sphinx-toolbox/sphinx-toolbox@v4.1.2...v4.2.0)

---
updated-dependencies:
- dependency-name: sphinx-toolbox
  dependency-version: 4.2.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

poetry.lock

@@ -54,7 +54,7 @@ dependencies = [
     "sphinx-copybutton>=0.5.0,<0.6",
     "sphinx-inline-tabs>=2023.4.21,<2024",
     "sphinx-design>=0.5.0,<1",
-    "sphinx-toolbox>=4.0.0,<5",
+    "sphinx-toolbox>=4.2.0,<5",
     "sphinxcontrib-mermaid (>=2.0.0,<3.0.0)",
     "structlog (>=25.5.0,<26.0.0)",
     "typer[all]>=0.7.0",