Bump sphinx from 7.2.6 to 7.3.7

Bumps [sphinx](https://github.com/sphinx-doc/sphinx) from 7.2.6 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@v7.2.6...v7.3.7)

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

Signed-off-by: dependabot[bot] <[email protected]>

pyproject.toml

@@ -32,7 +32,7 @@ dns_exporter = "dns_exporter.entrypoint:main"
 [project.optional-dependencies]
 dev = ["pre-commit == 3.6.2", "setuptools-scm == 8.0.4"]
 test = ["pytest == 8.1.1", "pytest-cov==5.0.0", "tox == 4.13.0", "requests==2.31.0", "pytest-randomly==3.15.0", "pytest-mock==3.12.0", "gera2ld.socks==0.5.0"]
-docs = ["Sphinx==7.2.6", "furo==2024.1.29"]
+docs = ["Sphinx==7.3.7", "furo==2024.1.29"]
 
 [project.urls]
 homepage = "https://github.com/tykling/dns_exporter"