Flaky 2m timeout on recently merged ZChannelSpec test case (JS)

I have noticed quite a few CI jobs fail for the JS platform regarding a [newly added](https://github.com/zio/zio/pull/7527) test case

```
- scoped closes the scope
Timeout of 2 m exceeded.
```

Reference CI job: https://github.com/zio/zio/actions/runs/3496203920/jobs/5853846722