Bump sphinx from 1.6.3 to 7.0.1

Bumps [sphinx](https://github.com/sphinx-doc/sphinx) from 1.6.3 to 7.0.1.
- [Release notes](https://github.com/sphinx-doc/sphinx/releases)
- [Changelog](https://github.com/sphinx-doc/sphinx/blob/master/CHANGES)
- [Commits](sphinx-doc/sphinx@v1.6.3...v7.0.1)

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

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

Author: dependabot[bot]

requirements_dev.txt

@@ -3,7 +3,7 @@ wheel==0.29.0
 flake8
 tox==3.25.1
 coverage==4.4.1
-Sphinx==1.6.3
+Sphinx==7.0.1
 PyYAML>=4.2b1
 pytest==7.1.2
 pytest-runner==2.11.1