Bump urllib3 from 2.5.0 to 2.6.0 in /docs/hybrid-slurm-cluster

Bumps [urllib3](https://github.com/urllib3/urllib3) from 2.5.0 to 2.6.0.
- [Release notes](https://github.com/urllib3/urllib3/releases)
- [Changelog](https://github.com/urllib3/urllib3/blob/main/CHANGES.rst)
- [Commits](urllib3/urllib3@2.5.0...2.6.0)

---
updated-dependencies:
- dependency-name: urllib3
  dependency-version: 2.6.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

docs/hybrid-slurm-cluster/requirements.txt

@@ -3,7 +3,7 @@ google-cloud-pubsub~=2.0
 google-api-python-client==2.61.0
 httplib2==0.20.4
 PyYAML==6.0
-urllib3==2.5.0
+urllib3==2.6.0
 protobuf==5.29.5
 certifi==2024.7.4
 setuptools==78.1.1