chore(deps): bump uvicorn in /examples/chatbots/python

Bumps [uvicorn](https://github.com/Kludex/uvicorn) from 0.37.0 to 0.38.0.
- [Release notes](https://github.com/Kludex/uvicorn/releases)
- [Changelog](https://github.com/Kludex/uvicorn/blob/main/docs/release-notes.md)
- [Commits](Kludex/uvicorn@0.37.0...0.38.0)

---
updated-dependencies:
- dependency-name: uvicorn
  dependency-version: 0.38.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

examples/chatbots/python/requirements.txt

@@ -1,6 +1,6 @@
 aiobotocore[boto3]==2.25.0
 mcp==1.20.0
-uvicorn==0.37.0
+uvicorn==0.38.0
 
 # For testing, this module is installed from local files.
 # Uncomment this line to build using the module from PyPi