Bump tornado from 6.0.2 to 6.3.3 in /archive_api_server

Bumps [tornado](https://github.com/tornadoweb/tornado) from 6.0.2 to 6.3.3.
- [Changelog](https://github.com/tornadoweb/tornado/blob/master/docs/releases.rst)
- [Commits](tornadoweb/tornado@v6.0.2...v6.3.3)

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

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

archive_api_server/requirements.txt

@@ -1,3 +1,3 @@
 psycopg2-binary==2.8.2
 queries==2.0.1
-tornado==6.0.2
+tornado==6.3.3