chore(deps): bump engine.io from 6.2.1 to 6.4.2 in /examples/latency

Bumps [engine.io](https://github.com/socketio/engine.io) from 6.2.1 to 6.4.2.
- [Release notes](https://github.com/socketio/engine.io/releases)
- [Changelog](https://github.com/socketio/engine.io/blob/main/CHANGELOG.md)
- [Commits](6.2.1...6.4.2)

---
updated-dependencies:
- dependency-name: engine.io
  dependency-type: direct:production
...

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

examples/latency/package.json

@@ -3,7 +3,7 @@
   "version": "0.1.0",
   "dependencies": {
     "enchilada": "0.13.0",
-    "engine.io": "^6.2.1",
+    "engine.io": "^6.4.2",
     "engine.io-client": "^4.1.4",
     "express": "^4.18.2",
     "smoothie": "1.19.0"