chore(deps): bump bedrock-agentcore in /patterns/langgraph-single-agent (#131)

Bumps [bedrock-agentcore](https://github.com/aws/bedrock-agentcore-sdk-python) from 1.4.7 to 1.6.1.
- [Release notes](https://github.com/aws/bedrock-agentcore-sdk-python/releases)
- [Changelog](https://github.com/aws/bedrock-agentcore-sdk-python/blob/main/CHANGELOG.md)
- [Commits](aws/bedrock-agentcore-sdk-python@v1.4.7...v1.6.1)

---
updated-dependencies:
- dependency-name: bedrock-agentcore
  dependency-version: 1.6.1
  dependency-type: direct:production
...

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Author: dependabot[bot]

patterns/langgraph-single-agent/requirements.txt

@@ -7,5 +7,5 @@ langgraph-checkpoint-aws==1.0.6
 mcp>=1.23.1
 urllib3>=2.6.3
 python-multipart>=0.0.22
-bedrock-agentcore==1.4.7
+bedrock-agentcore==1.6.1
 PyJWT[crypto]==2.13.0