Bump tornado

Bumps [tornado](https://github.com/tornadoweb/tornado) from 6.4.1 to 6.4.2.
- [Changelog](https://github.com/tornadoweb/tornado/blob/v6.4.2/docs/releases.rst)
- [Commits](tornadoweb/tornado@v6.4.1...v6.4.2)

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

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

genai-on-vertex-ai/agents/controlled_generation/agentic_scm/requirements.txt

@@ -62,7 +62,7 @@ smmap==5.0.1
 streamlit==1.38.0
 tenacity==8.5.0
 toml==0.10.2
-tornado==6.4.1
+tornado==6.4.2
 typing_extensions==4.12.2
 tzdata==2024.2
 uritemplate==4.1.1