build(deps): bump tornado from 6.2.0 to 6.5.5

Bumps [tornado](https://github.com/tornadoweb/tornado) from 6.2.0 to 6.5.5.
- [Changelog](https://github.com/tornadoweb/tornado/blob/master/docs/releases.rst)
- [Commits](tornadoweb/tornado@v6.2.0...v6.5.5)

---
updated-dependencies:
- dependency-name: tornado
  dependency-version: 6.5.5
  dependency-type: direct:production
...

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

Author: dependabot[bot]

pyproject.toml

@@ -60,7 +60,7 @@ dependencies = [
     "requests>=2.21.0",
     'tornado==6.1.0; python_version < "3.7.0"',
     'tornado==6.2.0; python_version == "3.7.0"',
-    'tornado==6.4.2; python_version >= "3.8.0"',
+    'tornado==6.5.5; python_version >= "3.8.0"',
     "gitpython>=3.1.0",
     "elasticsearch[async]>=7, <8; python_version < '3.7.0'",
     "elasticsearch-dsl>=7, <8; python_version < '3.7.0'",