build(deps): bump urllib3 from 2.0.5 to 2.0.6 in /requirements

Bumps [urllib3](https://github.com/urllib3/urllib3) from 2.0.5 to 2.0.6.
- [Release notes](https://github.com/urllib3/urllib3/releases)
- [Changelog](https://github.com/urllib3/urllib3/blob/main/CHANGES.rst)
- [Commits](urllib3/urllib3@v2.0.5...2.0.6)

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

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

Author: dependabot[bot]

requirements/pinned.txt

@@ -7,4 +7,4 @@ pycparser==2.21           # via cffi
 pynacl==1.5.0             # via securesystemslib
 requests==2.31.0
 securesystemslib[crypto,pynacl]==0.29.0
-urllib3==2.0.5           # via requests
+urllib3==2.0.6           # via requests