Bump urllib3 from 2.5.0 to 2.6.0 in /python/example_code/bedrock-agent

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]

python/example_code/bedrock-agent/requirements.txt

@@ -14,4 +14,4 @@ PyYAML==6.0.1
 requests==2.32.4
 s3transfer==0.12.0
 six==1.16.0
-urllib3==2.5.0
+urllib3==2.6.0