Bump sphinx from 7.2.6 to 7.4.5 (#227)

Bumps [sphinx](https://github.com/sphinx-doc/sphinx) from 7.2.6 to 7.4.5.
- [Release notes](https://github.com/sphinx-doc/sphinx/releases)
- [Changelog](https://github.com/sphinx-doc/sphinx/blob/master/CHANGES.rst)
- [Commits](sphinx-doc/sphinx@v7.2.6...v7.4.5)

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

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

docs/requirements.txt

@@ -1,6 +1,6 @@
 -i https://pypi.org/simple
 recommonmark==0.7.1
-sphinx==7.2.6; python_version >= '3.9'
+sphinx==7.4.5; python_version >= '3.9'
 sphinx-rtd-theme==2.0.0; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4, 3.5'
 pydantic==2.1.1
 pyqt5==5.15.10