Bump tornado from 6.3.3 to 6.4.1 in /python-rag-chatbot

Bumps [tornado](https://github.com/tornadoweb/tornado) from 6.3.3 to 6.4.1.
- [Changelog](https://github.com/tornadoweb/tornado/blob/master/docs/releases.rst)
- [Commits](tornadoweb/tornado@v6.3.3...v6.4.1)

---
updated-dependencies:
- dependency-name: tornado
  dependency-type: direct:production
...

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

python-rag-chatbot/requirements.txt

@@ -248,7 +248,7 @@ tomlkit==0.12.5
 toolz==0.12.0
 torch==2.2.2
 torchvision==0.17.2
-tornado==6.3.3
+tornado==6.4.1
 tqdm==4.66.1
 traitlets==5.11.2
 transformers==4.41.2