Bump tornado from 6.4.1 to 6.4.2 (#145)

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] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

requirements.dev.txt

@@ -438,7 +438,7 @@ tomlkit==0.13.2
     # via
     #   pylint
     #   snowflake-connector-python
-tornado==6.4.1
+tornado==6.4.2
     # via
     #   ipykernel
     #   jupyter-client

requirements.ipython.txt

@@ -328,7 +328,7 @@ tomli==2.0.1
     # via pytest
 tomlkit==0.13.2
     # via snowflake-connector-python
-tornado==6.4.1
+tornado==6.4.2
     # via
     #   ipykernel
     #   jupyter-client