Bump sphinx from 5.1.1 to 7.3.7

Bumps [sphinx](https://github.com/sphinx-doc/sphinx) from 5.1.1 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@v5.1.1...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]

docs/requirements.txt

@@ -1,5 +1,5 @@
 alabaster==0.7.12
-Sphinx==5.1.1
+Sphinx==7.3.7
 sphinx-rtd-theme==1.0.0
 sphinx-copybutton==0.5.1
 importlib-metadata; python_version < '3.8'