Bump sphinx from 6.2.1 to 7.3.7

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] <[email protected]>

Author: dependabot[bot]

requirements/docs.txt

@@ -1,6 +1,6 @@
 -r dev.txt
 
-sphinx==6.2.1
+sphinx==7.3.7
 sphinx_rtd_theme==2.0.0
 sphinx-automodapi==0.17.0
 nbsphinx==0.9.3