Bump sphinx-celery from 2.1.1 to 2.1.3

Bumps [sphinx-celery](https://github.com/celery/sphinx_celery) from 2.1.1 to 2.1.3.
- [Release notes](https://github.com/celery/sphinx_celery/releases)
- [Changelog](https://github.com/celery/sphinx_celery/blob/master/Changelog)
- [Commits](celery/sphinx_celery@v2.1.1...v2.1.3)

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

Signed-off-by: dependabot[bot] <support@github.com>

pyproject.toml

@@ -132,7 +132,7 @@ tox = [
 optional = true
 
 [tool.poetry.group.docs.dependencies]
-sphinx_celery = "^2.0.0"
+sphinx_celery = "^2.1.3"
 Sphinx = [
     { version = "^7.1.0", python = "<3.9" },
     { version = "^7.0.0", python = ">=3.9,<4.0" },