pip prod(deps): bump tornado from 6.1 to 6.4.1 in /bots/hermes

Bumps [tornado](https://github.com/tornadoweb/tornado) from 6.1 to 6.4.1.
- [Changelog](https://github.com/tornadoweb/tornado/blob/master/docs/releases.rst)
- [Commits](tornadoweb/tornado@v6.1.0...v6.4.1)

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

Signed-off-by: dependabot[bot] <[email protected]>

bots/hermes/requirements.txt

@@ -39,7 +39,7 @@ requests-oauthlib==1.3.0
 rsa==4.8
 six==1.16.0
 toml==0.10.2
-tornado==6.1
+tornado==6.4.1
 tweepy==4.4.0
 typing-inspect==0.7.1
 typing_extensions==4.0.1