Intermittent error in /html/canvas/offscreen/text/2d.text.measure.getActualBoundingBox.tentative.html

```
  ▶ ERROR [expected OK] /html/canvas/offscreen/text/2d.text.measure.getActualBoundingBox.tentative.html
  └   → Unhandled rejection: A network error occurred.

```

https://github.com/servo/servo/actions/runs/23635591761/job/68847135276