fix: appengine/websockets/package.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-TARFS-9535930

Author: snyk-bot

appengine/websockets/package.json

@@ -22,6 +22,6 @@
   },
   "devDependencies": {
     "mocha": "^9.2.2",
-    "puppeteer": "^13.3.0"
+    "puppeteer": "^22.8.2"
   }
 }