Bump urllib3 from 2.5.0 to 2.6.0 in /frontend

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]

frontend/requirements_frozen.txt

@@ -53,6 +53,6 @@ sphinxcontrib-serializinghtml==2.0.0
 stack-data==0.6.3
 traitlets==5.14.3
 typing_extensions==4.15.0
-urllib3==2.5.0
+urllib3==2.6.0
 wcwidth==0.2.14
 websocket-client==1.9.0