Bump types-requests from 2.28.11.5 to 2.28.11.8 in /tools

Bumps [types-requests](https://github.com/python/typeshed) from 2.28.11.5 to 2.28.11.8.
- [Release notes](https://github.com/python/typeshed/releases)
- [Commits](https://github.com/python/typeshed/commits)

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

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

tools/requirements_mypy.txt

@@ -5,7 +5,7 @@ typed-ast==1.5.4
 types-atomicwrites==1.4.5
 types-python-dateutil==2.8.19
 types-PyYAML==6.0.12.3
-types-requests==2.28.11.5
+types-requests==2.28.11.8
 types-setuptools==63.2.3
 types-six==1.16.19
 types-ujson==4.2.1