build(deps-dev): bump types-python-dateutil

Bumps [types-python-dateutil](https://github.com/typeshed-internal/stub_uploader) from 2.9.0.20250822 to 2.9.0.20251008.
- [Commits](https://github.com/typeshed-internal/stub_uploader/commits)

---
updated-dependencies:
- dependency-name: types-python-dateutil
  dependency-version: 2.9.0.20251008
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

poetry.lock

@@ -82,7 +82,7 @@ include = [
 requests-mock = "^1.12.1"
 mypy = "^1.18.2"
 types-requests = "^2.32.4.20250913"
-types-python-dateutil = "^2.9.0.20250822"
+types-python-dateutil = "^2.9.0.20251008"
 types-redis = "^4.6.0.20241004"
 types-Flask = "^1.1.6"
 pytest-cov = "^7.0.0"