DEP(deps): Update sphinx-toolbox requirement from >=2.16.0 to >=4.2.0 (#271)

* DEP(deps): Update sphinx-toolbox requirement from >=2.16.0 to >=4.2.0

Updates the requirements on [sphinx-toolbox](https://github.com/sphinx-toolbox/sphinx-toolbox) to permit the latest version.
- [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@v2.16.0...v4.2.0)

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

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

* fix conflicts: update sphinx-toolbox to >=4.2.0

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Daniel <denisneuf@hotmail.com>

Author: dependabot[bot]

docs/requirements.txt

@@ -3,7 +3,7 @@ sphinx
 sphinx_rtd_theme
 sphinxcontrib-napoleon
 sphinx-jinja2-compat>=0.4.1
-sphinx-toolbox>=2.16.0
+sphinx-toolbox>=4.2.0
 enum-tools[sphinx]
 pydata-sphinx-theme
 
@@ -16,3 +16,4 @@ pytz>=2026.2,<2027.0
 confuse>=2.2.0,<2.3
 python-dotenv
 pyyaml
+