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

Bumps [types-python-dateutil](https://github.com/python/typeshed) from 2.8.19.20240311 to 2.9.0.20240315.
- [Commits](https://github.com/python/typeshed/commits)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

requirements-dev.txt

@@ -108,7 +108,7 @@ tomlkit==0.12.4 ; python_version >= '3.7'
 
 trio==0.24.0
 
-types-python-dateutil==2.8.19.20240311
+types-python-dateutil==2.9.0.20240315
 
 typing-extensions==4.10.0 ; python_version >= '3.7'