Bump sphinx-toolbox from 3.7.0 to 3.8.0

Bumps [sphinx-toolbox](https://github.com/sphinx-toolbox/sphinx-toolbox) from 3.7.0 to 3.8.0.
- [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@v3.7.0...v3.8.0)

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

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

pyproject.toml

@@ -55,7 +55,7 @@ docs = [
     "myst-nb==1.1.1",
     "sphinx-book-theme==1.1.3",
     "sphinx-argparse==0.5.2",
-    "sphinx-toolbox==3.7.0",
+    "sphinx-toolbox==3.8.0",
 ]
 
 [project.scripts]