### Bug description

Like #5964

https://models-on-a-plane.pages.dev/

The navbar at top includes an external link to calcwithdec.dev, which doesn't open in a new window, despite `link-external-newwindow: true` in `_quarto.yml`

### Steps to reproduce

_No response_

### Expected behavior

External link should open in a new window/tab

### Actual behavior

Opens in existing tab, taking user away from website.

### Your environment

OS: Ubuntu

### Quarto check output

```
[✓] Checking versions of quarto binary dependencies...
      Pandoc version 3.1.2: OK
      Dart Sass version 1.55.0: OK
      Deno version 1.33.2: OK
[✓] Checking versions of quarto dependencies......OK
[✓] Checking Quarto installation......OK
      Version: 1.4.151
      Path: /opt/quarto/bin
```
2023-06-20T17:35:41Z
declann
closed
navbar external links don't obey `link-external-newwindow: true`
https://github.com/quarto-dev/quarto-cli/issues/5985