Bump types-python-dateutil from 2.8.19 to 2.8.19.6 in /tools

Bumps [types-python-dateutil](https://github.com/python/typeshed) from 2.8.19 to 2.8.19.6.
- [Release notes](https://github.com/python/typeshed/releases)
- [Commits](https://github.com/python/typeshed/commits)

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

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

tools/requirements_mypy.txt

@@ -3,7 +3,7 @@ mypy-extensions==0.4.3
 toml==0.10.2
 typed-ast==1.5.4
 types-atomicwrites==1.4.5
-types-python-dateutil==2.8.19
+types-python-dateutil==2.8.19.6
 types-PyYAML==6.0.12.3
 types-requests==2.28.11.5
 types-setuptools==63.2.3