### Bug description

Some links cannot be previewed in revealjs.

Could we set proxy and headers for request happlen in quarto document?  

### Steps to reproduce

```qmd
---
format: 
    revealjs:
        preview-links: true
---

## sd

[link](https://huggingface.co/datasets/imdb)
```

### Expected behavior

Links can be previewed correctly as in browser

### Actual behavior

it says "huggingface.co refuse to connect"

### Your environment

- Arch Linux
- Chrome 

### Quarto check output

_No response_
cderv
2023-06-08T09:27:24Z
fecet
documentation revealjs html
v1.4
open
Refuse to connect in preview-links.
https://github.com/quarto-dev/quarto-cli/issues/5850