Intermittent PASS in `/visual-viewport/viewport-apply-initial-scale-after-navigation.html`

```
Stable unexpected results (1): 
  ▶ PASS [expected TIMEOUT] /visual-viewport/viewport-apply-initial-scale-after-navigation.html
```
https://github.com/servo/servo/actions/runs/20541881775/job/59007481020