Streaming documentation missing any mention of this error object

I’m seeing WebSocket connections sending errors in the form of:
```json
{
  "error": "Something went wrong",
  "status": 400
}
```

This is not only not mentioned in the [streaming documentation](https://docs.joinmastodon.org/methods/streaming), but the docs incorrectly claim that the socket only sends `Event` objects, which these errors are not.