build(deps): bump urllib3 in /helm-chart/images/binderhub

Bumps [urllib3](https://github.com/urllib3/urllib3) from 1.26.4 to 1.26.5.
- [Release notes](https://github.com/urllib3/urllib3/releases)
- [Changelog](https://github.com/urllib3/urllib3/blob/main/CHANGES.rst)
- [Commits](urllib3/urllib3@1.26.4...1.26.5)

---
updated-dependencies:
- dependency-name: urllib3
  dependency-type: indirect
...

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

Author: dependabot[bot]

helm-chart/images/binderhub/requirements.txt

@@ -138,7 +138,7 @@ traitlets==5.0.5
     # via
     #   jupyter-telemetry
     #   jupyterhub
-urllib3==1.26.4
+urllib3==1.26.5
     # via
     #   kubernetes
     #   requests