Bump sphinx from 6.2.1 to 7.3.7 (#748)

Bumps [sphinx](https://github.com/sphinx-doc/sphinx) from 6.2.1 to 7.3.7.
- [Release notes](https://github.com/sphinx-doc/sphinx/releases)
- [Changelog](https://github.com/sphinx-doc/sphinx/blob/master/CHANGES.rst)
- [Commits](sphinx-doc/sphinx@v6.2.1...v7.3.7)

---
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>

Author: dependabot[bot]

requirements.txt

@@ -35,7 +35,7 @@ requests==2.31.0
 reuse==3.0.2
 snowballstemmer==2.2.0
 soupsieve==2.5
-Sphinx==6.2.1
+Sphinx==7.3.7
 sphinx-book-theme==1.1.2
 sphinxcontrib-applehelp==1.0.8
 sphinxcontrib-devhelp==1.0.6