Build(deps): bump tornado in /frameworks/Python/tornado

Bumps [tornado](https://github.com/tornadoweb/tornado) from 6.0.2 to 6.5.5.
- [Changelog](https://github.com/tornadoweb/tornado/blob/master/docs/releases.rst)
- [Commits](tornadoweb/tornado@v6.0.2...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]

frameworks/Python/tornado/requirements_mongo.txt

@@ -1,4 +1,4 @@
-tornado==6.0.2
+tornado==6.5.5
 motor==2.0.0
 uvloop==0.12.2
 ujson==1.35

frameworks/Python/tornado/requirements_uvloop.txt

@@ -1,4 +1,4 @@
 asyncpg==0.21.0
-tornado==6.0.2
+tornado==6.5.5
 ujson==1.35
 uvloop==0.12.1