Update dependency types-python-dateutil to v2.9.0.20260408

Author: renovate[bot]

pyproject.toml

@@ -52,7 +52,7 @@ dependencies = [
 dev = [
     'pre-commit==4.5.1',
     'django-stubs==5.2.9',
-    'types-python-dateutil==2.9.0.20260124',
+    'types-python-dateutil==2.9.0.20260408',
     'types-requests==2.32.4.20260107',
     'mypy==1.19.1',
 ]