Merge pull request #2607 from VWS-Python/dependabot/pip/sphinx-toolbox-4.0.0

Bump sphinx-toolbox from 3.10.0 to 4.0.0

Author: github-actions[bot]

pyproject.toml

@@ -92,7 +92,7 @@ optional-dependencies.dev = [
     "sphinx-paramlinks==0.6",
     "sphinx-pyproject==0.3.0",
     "sphinx-substitution-extensions==2025.4.3",
-    "sphinx-toolbox==3.10.0",
+    "sphinx-toolbox==4.0.0",
     "sphinxcontrib-httpdomain==1.8.1",
     "sphinxcontrib-spelling==8.0.1",
     "sybil==9.1.0",