Update tornado requirement from <=6.4,>=6.2 to <=6.4.1,>=6.4.1 (#6988)

Updates the requirements on [tornado](https://github.com/tornadoweb/tornado) to permit the latest version.
- [Changelog](https://github.com/tornadoweb/tornado/blob/master/docs/releases.rst)
- [Commits](https://github.com/tornadoweb/tornado/compare/v6.2.0...v6.4.1)

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

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

pyproject.toml

@@ -52,7 +52,7 @@ dependencies = [
     "pyperclip<=1.9.0,>=1.9.0",
     "ruamel.yaml>=0.16,<=0.18.6",
     "sortedcontainers>=2.3,<=2.4.0",
-    "tornado>=6.2,<=6.4",
+    "tornado<=6.4.1,>=6.4.1",
     "typing-extensions>=4.3,<=4.11.0; python_version<'3.11'",
     "urwid>=2.6.14,<=2.6.14",
     "wsproto>=1.0,<=1.2.0",