added missing dependency

Author: x3c41a

examples/package.json

@@ -15,7 +15,8 @@
     "ipfs-http-client": "^60.0.1",
     "multiformats": "^13.4.1",
     "polkadot-api": "^1.20.6",
-    "smoldot": "^2.0.40"
+    "smoldot": "^2.0.40",
+    "ws": "^8.18.0"
   },
   "devDependencies": {
     "@polkadot-api/cli": "^0.13.3"