Intermittent ERROR in `/fetch/fetch-later/quota/same-origin-iframe/accumulated-oversized-payload.https.window.html`

```
Stable unexpected results (1): 
  ▶ OK [expected ERROR] /fetch/fetch-later/quota/same-origin-iframe/accumulated-oversized-payload.https.window.html
```

https://github.com/servo/servo/actions/runs/20737399248/job/59538079784