Fix testable simd models CI job.

Author: maximebuyse

.github/workflows/testable-simd-models.yml

@@ -26,5 +26,6 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Run tests
+        working-directory: testable-simd-models
         run: cargo test -- --test-threads=1 --nocapture