chore(deps-dev): bump sphinx from 8.0.2 to 8.1.3

Bumps [sphinx](https://github.com/sphinx-doc/sphinx) from 8.0.2 to 8.1.3.
- [Release notes](https://github.com/sphinx-doc/sphinx/releases)
- [Changelog](https://github.com/sphinx-doc/sphinx/blob/v8.1.3/CHANGES.rst)
- [Commits](sphinx-doc/sphinx@v8.0.2...v8.1.3)

---
updated-dependencies:
- dependency-name: sphinx
  dependency-version: 8.1.3
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

poetry.lock

@@ -77,7 +77,7 @@ linkify-it-py               = {python=">=3.10", version=">=2.0"}
 markdown-it-py              = {python=">=3.10", version=">=2.2"}
 myst-parser                 = {python=">=3.10", version=">=3.0"}
 python-forge                = {python=">=3.10", version="^18.6"}
-sphinx                      = {python=">=3.10", version="8.0.2"}
+sphinx                      = {python=">=3.10", version="8.1.3"}
 sphinx-automodapi           = {python=">=3.10", version=">=0.18,<0.21"}
 sphinx-autodoc-typehints    = {python=">=3.10", version="^2.4"}
 sphinx-copybutton           = {python=">=3.10", version="^0.5"}