[flaky] test\websocket\diagnostics-channel-ping-pong.js

```console
test at test\websocket\diagnostics-channel-ping-pong.js:1:1
✖ D:\a\undici\undici\test\websocket\diagnostics-channel-ping-pong.js (648.0872ms)
  'test failed'
```

Example: https://github.com/nodejs/undici/actions/runs/25355523001/job/74350591790?pr=5194