Bump ws from 8.20.1 to 8.21.0 in /tutorial-video (#1053)

Bumps [ws](https://github.com/websockets/ws) from 8.20.1 to 8.21.0.
- [Release notes](https://github.com/websockets/ws/releases)
- [Commits](websockets/ws@8.20.1...8.21.0)

---
updated-dependencies:
- dependency-name: ws
  dependency-version: 8.21.0
  dependency-type: indirect
...

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tutorial-video/package-lock.json

@@ -21,6 +21,6 @@
     "typescript": "^5.6.3"
   },
   "overrides": {
-    "ws": "^8.20.1"
+    "ws": "^8.21.0"
   }
 }