Bump ws from 6.2.1 to 6.2.2 in /demo/graph-tutorial

Bumps [ws](https://github.com/websockets/ws) from 6.2.1 to 6.2.2.
- [Release notes](https://github.com/websockets/ws/releases)
- [Commits](https://github.com/websockets/ws/commits)

---
updated-dependencies:
- dependency-name: ws
  dependency-type: indirect
...

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

Author: dependabot[bot]

demo/graph-tutorial/yarn.lock

@@ -11697,9 +11697,9 @@ write-file-atomic@^3.0.0:
     typedarray-to-buffer "^3.1.5"
 
 ws@^6.2.1:
-  version "6.2.1"
-  resolved "https://registry.yarnpkg.com/ws/-/ws-6.2.1.tgz#442fdf0a47ed64f59b6a5d8ff130f4748ed524fb"
-  integrity sha512-GIyAXC2cB7LjvpgMt9EKS2ldqr0MTrORaleiOno6TweZ6r3TKtoFQWay/2PceJ3RuBasOHzXNn5Lrw1X0bEjqA==
+  version "6.2.2"
+  resolved "https://registry.yarnpkg.com/ws/-/ws-6.2.2.tgz#dd5cdbd57a9979916097652d78f1cc5faea0c32e"
+  integrity sha512-zmhltoSR8u1cnDsD43TX59mzoMZsLKqUweyYBAIvTngR3shc0W6aOZylZmq/7hqyVxPdi+5Ud2QInblgyE72fw==
   dependencies:
     async-limiter "~1.0.0"