Intermittent failure in /css/WOFF2/header-length-002.xht

https://github.com/servo/servo/actions/runs/17856164905/job/50776143180
```
  ▶ FAIL [expected PASS] /css/WOFF2/header-length-002.xht
  │   → /css/WOFF2/header-length-002.xht ['fb594d6c257c456aa11b243711f1c5854ca55350']
  └   → /css/WOFF2/header-length-002-ref.xht ['fa88bd1fb0d563c33c051bf0abb7f779e43bae96']
```