chore(deps): bump the python-chatbots group (#1390)

Bumps the python-chatbots group in /examples/chatbots/python with 2 updates: [mcp](https://github.com/modelcontextprotocol/python-sdk) and [boto3](https://github.com/boto/boto3).


Updates `mcp` 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)

Updates `boto3` from 1.42.84 to 1.43.4
- [Release notes](https://github.com/boto/boto3/releases)
- [Commits](boto/boto3@1.42.84...1.43.4)

---
updated-dependencies:
- dependency-name: mcp
  dependency-version: 1.27.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: python-chatbots
- dependency-name: boto3
  dependency-version: 1.43.4
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: python-chatbots
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

examples/chatbots/python/requirements.txt

@@ -1,7 +1,7 @@
 strands-agents==1.38.0
-mcp==1.26.0
+mcp==1.27.0
 uvicorn==0.46.0
-boto3==1.42.84
+boto3==1.43.4
 
 # For testing, this module is installed from local files.
 # Uncomment this line to build using the module from PyPi