Bump urllib3 from 2.5.0 to 2.6.3 in /python/example_code/bedrock-runtime/cross-model-scenarios/tool_use_demo (#7706)

Author: dependabot[bot]

python/example_code/bedrock-runtime/cross-model-scenarios/tool_use_demo/requirements.txt

@@ -8,4 +8,4 @@ python-dateutil==2.9.0.post0
 requests==2.32.3
 s3transfer==0.10.1
 six==1.16.0
-urllib3==2.5.0
+urllib3==2.6.3