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]>

docs/requirements.txt

@@ -1,3 +1,3 @@
 sphinx==8.0.2
 furo==2024.8.6
-sphinx-toolbox==3.7.0
+sphinx-toolbox==3.8.0

requirements.txt

@@ -7,4 +7,4 @@ colorlog==6.8.2
 furo==2024.8.6
 ruff==0.6.1
 ha-ffmpeg==3.2.0
-sphinx-toolbox==3.7.0
+sphinx-toolbox==3.8.0