[Bug]: _computedKey error now appears in Deno Deploy

### Problem description

As of today, the _computedKey bug that was fixed in Deno CLI 1.40.5 is cropping up in Deno Deploy...

https://github.com/denoland/deno/issues/22109

Error now appearing in Deploy:

```
✖ Deployment failed.
error: The deployment failed: UNCAUGHT_EXCEPTION
ReferenceError: _computedKey is not defined
at https://deno.land/x/openai@v4.28.0/lib/ChatCompletionStream.ts:4:14
```

### Steps to reproduce

Deploy code that use the OpenAI module referenced in the error above.

### Expected behavior

Not to error, like Deno 1.40.5

### Environment

_No response_

### Possible solution

_No response_

### Additional context

_No response_