build(deps): bump urllib3 from 2.5.0 to 2.6.1 in the dependencies group

Bumps the dependencies group with 1 update: [urllib3](https://github.com/urllib3/urllib3).


Updates `urllib3` from 2.5.0 to 2.6.1
- [Release notes](https://github.com/urllib3/urllib3/releases)
- [Changelog](https://github.com/urllib3/urllib3/blob/main/CHANGES.rst)
- [Commits](urllib3/urllib3@2.5.0...2.6.1)

---
updated-dependencies:
- dependency-name: urllib3
  dependency-version: 2.6.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: dependencies
...

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

Author: dependabot[bot]

requirements/pinned.txt

@@ -12,5 +12,5 @@ pycparser==2.23
     # via cffi
 securesystemslib==1.3.1
     # via -r requirements/main.txt
-urllib3==2.5.0
+urllib3==2.6.1
     # via -r requirements/main.txt