Update python-dateutil requirement from >=2.8.2 to >=3.0.0

Updates the requirements on [python-dateutil](https://github.com/dateutil/dateutil) to permit the latest version.
- [Release notes](https://github.com/dateutil/dateutil/releases)
- [Changelog](https://github.com/dateutil/dateutil/blob/master/NEWS)
- [Commits](dateutil/dateutil@2.8.2...3.0.0)

---
updated-dependencies:
- dependency-name: python-dateutil
  dependency-version: 3.0.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

requirements-asyncio.txt

@@ -1,4 +1,4 @@
-python-dateutil>=2.8.2  # BSD
+python-dateutil>=3.0.0  # BSD
 PyYAML>=6.0.3  # MIT
 urllib3>=2.8.0 # MIT
 aiohttp>=3.14.5,<4.0.0  # Apache-2.0

requirements.txt

@@ -1,5 +1,5 @@
 certifi>=2024.7.4 # MPL -- oldest release without a known advisory (CVE-2024-39689)
-python-dateutil>=2.8.2  # BSD
+python-dateutil>=3.0.0  # BSD
 pydantic>=2.14.1  # MIT
 setuptools>=84.2.0  # PSF/ZPL
 PyYAML>=6.0.3  # MIT