Bump sphinx from 6.1.3 to 7.1.2

Bumps [sphinx](https://github.com/sphinx-doc/sphinx) from 6.1.3 to 7.1.2.
- [Release notes](https://github.com/sphinx-doc/sphinx/releases)
- [Changelog](https://github.com/sphinx-doc/sphinx/blob/master/CHANGES)
- [Commits](sphinx-doc/sphinx@v6.1.3...v7.1.2)

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

Signed-off-by: dependabot[bot] <[email protected]>

setup.py

@@ -69,7 +69,7 @@ def get_version():
     setup_requires=["pytest-runner"],
     extras_require={
         "docs": [
-            "Sphinx==6.1.3",
+            "Sphinx==7.1.2",
             "furo==2023.3.27",
             "sphinx-autobuild",
             "codespell>=2.2.5",