deps: bump sphinx from 5.3.0 to 7.1.2 (#662)

Bumps [sphinx](https://github.com/sphinx-doc/sphinx) from 5.3.0 to 7.1.2.
- [Release notes](https://github.com/sphinx-doc/sphinx/releases)
- [Changelog](https://github.com/sphinx-doc/sphinx/blob/master/CHANGES.rst)
- [Commits](sphinx-doc/sphinx@v5.3.0...v7.1.2)

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

pyproject.toml

@@ -37,7 +37,7 @@ coverage = {extras = ["toml"], version = "^7.1"}
 safety = ">=2.3.5,<4.0.0"
 mypy = "^1.0"
 xdoctest = {extras = ["colors"], version = "^1.1.1"}
-sphinx = ">=4.3.2,<6.0.0"
+sphinx = ">=4.3.2,<8.0.0"
 sphinx-autobuild = ">=2021.3.14"
 pre-commit = "^2.21.0"
 reorder-python-imports = "^3.9.0"