chore(deps): bump mcp from 1.26.0 to 1.27.0 in /examples/chatbots/python

Bumps [mcp](https://github.com/modelcontextprotocol/python-sdk) from 1.26.0 to 1.27.0.
- [Release notes](https://github.com/modelcontextprotocol/python-sdk/releases)
- [Changelog](https://github.com/modelcontextprotocol/python-sdk/blob/main/RELEASE.md)
- [Commits](modelcontextprotocol/python-sdk@v1.26.0...v1.27.0)

---
updated-dependencies:
- dependency-name: mcp
  dependency-version: 1.27.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

examples/chatbots/python/requirements.txt

@@ -1,5 +1,5 @@
 strands-agents==1.35.0
-mcp==1.26.0
+mcp==1.27.0
 uvicorn==0.42.0
 boto3==1.42.84