Bump tornado from 6.3.3 to 6.4.1 in /webinars/genai-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>

Author: dependabot[bot]

webinars/genai-chatbot/requirements.txt

@@ -73,7 +73,7 @@ tenacity==8.2.3
 tokenizers==0.14.1
 toml==0.10.2
 toolz==0.12.0
-tornado==6.3.3
+tornado==6.4.1
 tqdm==4.66.1
 transformers==4.34.1
 typing-inspect==0.9.0