Bump urllib3 in /requirements in the pip group across 1 directory

Bumps the pip group with 1 update in the /requirements directory: [urllib3](https://github.com/urllib3/urllib3).


Updates `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
  dependency-group: pip
...

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

Author: dependabot[bot]

requirements/requirements-api.txt

@@ -240,7 +240,7 @@ tzdata==2025.2
     # via
     #   arrow
     #   pandas
-urllib3==2.5.0
+urllib3==2.6.0
     # via
     #   requests
     #   responses