chore: fix websocket example pnpm version

Author: KATT

package.json

@@ -5,7 +5,7 @@
   "engines": {
     "node": "^18.15.0"
   },
-  "packageManager": "pnpm@8.4.0",
+  "packageManager": "pnpm@8.6.0",
   "scripts": {
     "prebuild": "prisma generate && prisma migrate deploy",
     "build:1-next": "cross-env NODE_ENV=production next build",