Intermittent TIMEOUT in `/html/semantics/embedded-content/media-elements/seeking/seek-to-negative-time.htm`

https://github.com/servo/servo/actions/runs/12185117992/job/33992383121

```
  ▶ TIMEOUT [expected OK] /html/semantics/embedded-content/media-elements/seeking/seek-to-negative-time.htm
  │   ▶ TIMEOUT [expected FAIL] seek to negative time
  └   └   → Test timed out
```