chore(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

@@ -46,6 +46,6 @@ pytest = "8.4.1"
 flake8 = "7.3.0"
 deepdiff = "8.6.1"
 mypy = "1.18.2"
-types-python-dateutil = "2.9.0.20250822"
+types-python-dateutil = "2.9.0.20251008"
 tox = "4.31.0"
 sortedcontainers-stubs = "2.4.3"