Bump sphinx from 8.1.0 to 8.1.3 in the python-packages group

Bumps the python-packages group with 1 update: [sphinx](https://github.com/sphinx-doc/sphinx).


Updates `sphinx` from 8.1.0 to 8.1.3
- [Release notes](https://github.com/sphinx-doc/sphinx/releases)
- [Changelog](https://github.com/sphinx-doc/sphinx/blob/master/CHANGES.rst)
- [Commits](sphinx-doc/sphinx@v8.1.0...v8.1.3)

---
updated-dependencies:
- dependency-name: sphinx
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: python-packages
...

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

pyproject.toml

@@ -26,7 +26,7 @@ test = [
     "flake8 == 7.1.1"
 ]
 docs = [
-    "Sphinx == 8.1.0",
+    "Sphinx == 8.1.3",
     "sphinx-rtd-theme == 3.0.1",
     "autodocsumm == 0.2.13"
 ]