Update sphinx requirement from ^5.0.2 to >=5.0.2,<8.0.0

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@v5.0.2...v7.2.6)

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

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

pyproject.toml

@@ -49,7 +49,7 @@ rich = "^13.7.0"
 pytest-django = "^4.5.2"
 isort = "^5.6.4"
 pytest-cov = "^4.0.0"
-Sphinx = "^5.0.2"
+Sphinx = ">=5.0.2,<8.0.0"
 sphinx-rtd-theme = "^2.0.0"
 mypy = ">=0.991,<1.5"
 pylint = '^3.0'