⬆️ 🤖 Dependencies: Update sphinx requirement from 7.4.7 to 8.1.3

Updates the requirements on [sphinx](https://github.com/sphinx-doc/sphinx) to permit the latest version.
- [Release notes](https://github.com/sphinx-doc/sphinx/releases)
- [Changelog](https://github.com/sphinx-doc/sphinx/blob/master/CHANGES.rst)
- [Commits](sphinx-doc/sphinx@v7.4.7...v8.1.3)

---
updated-dependencies:
- dependency-name: sphinx
  dependency-type: direct:development
...

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

pyproject.toml

@@ -118,7 +118,7 @@ pytest-loguru = "^0.4.0"
 optional = true
 
 [tool.poetry.group.docs.dependencies]
-sphinx = "7.4.7"
+sphinx = "8.1.3"
 pydata-sphinx-theme = "^0.14.0"
 sphinx-hoverxref = "^1.3.0"
 sphinx_copybutton = "0.5.2"