Bump tornado from 6.1 to 6.2

Bumps [tornado](https://github.com/tornadoweb/tornado) from 6.1 to 6.2.
- [Release notes](https://github.com/tornadoweb/tornado/releases)
- [Changelog](https://github.com/tornadoweb/tornado/blob/master/docs/releases.rst)
- [Commits](https://github.com/tornadoweb/tornado/compare/v6.1.0...v6.2.0)

---
updated-dependencies:
- dependency-name: tornado
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

requirements.txt

@@ -2,7 +2,7 @@ voluptuous==0.13.1
 PyYAML==6.0
 paho-mqtt==1.6.1
 colorama==0.4.5
-tornado==6.1
+tornado==6.2
 tzlocal==4.2    # from time
 tzdata>=2021.1  # from time
 pyserial==3.5