Bump tornado from 6.4 to 6.4.2 in /Oracle-23ai-RAG-Chatbot

Bumps [tornado](https://github.com/tornadoweb/tornado) from 6.4 to 6.4.2.
- [Changelog](https://github.com/tornadoweb/tornado/blob/v6.4.2/docs/releases.rst)
- [Commits](tornadoweb/tornado@v6.4.0...v6.4.2)

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

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

Author: dependabot[bot]

Oracle-23ai-RAG-Chatbot/requirements.txt

@@ -216,7 +216,7 @@ tokenize-rt==5.2.0
 tokenizers==0.15.2
 toml==0.10.2
 toolz==0.12.1
-tornado==6.4
+tornado==6.4.2
 tqdm==4.66.2
 traitlets==5.14.2
 types-python-dateutil==2.8.19.20240311