build(deps): bump tornado from 6.5.6 to 6.5.7

Bumps [tornado](https://github.com/tornadoweb/tornado) from 6.5.6 to 6.5.7.
- [Changelog](https://github.com/tornadoweb/tornado/blob/master/docs/releases.rst)
- [Commits](tornadoweb/tornado@v6.5.6...v6.5.7)

---
updated-dependencies:
- dependency-name: tornado
  dependency-version: 6.5.7
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

requirements.txt

@@ -20,7 +20,7 @@ python_dateutil == 2.8.2
 rich            >= 13.3.5
 setuptools
 sidetrack       >= 2.0.1
-tornado         == 6.5.6
+tornado         == 6.5.7
 python-slugify  == 8.0.1
 validators      == 0.20.0
 wand            == 0.6.11