Bump sphinx from 7.3.6 to 7.3.7 (#969)

Bumps [sphinx](https://github.com/sphinx-doc/sphinx) from 7.3.6 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@v7.3.6...v7.3.7)

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

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

Author: dependabot[bot]

requirements/doc.txt

@@ -1,4 +1,4 @@
-sphinx==7.3.6
+sphinx==7.3.7
 pyenchant==3.2.2
 sphinxcontrib-spelling==8.0.0
 sphinxcontrib-towncrier