Bump tornado from 6.4.1 to 6.4.2 in /requirements

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
  update-type: version-update:semver-patch
...

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

requirements/base.txt

@@ -85,7 +85,7 @@ cloudpickle==3.1.0
 # https://pypi.org/project/toolz/
 toolz==1.0.0
 # https://pypi.org/project/tornado/
-tornado==6.4.1
+tornado==6.4.2
 # https://pandas.pydata.org/
 pandas==2.2.3