fix(ci): update embedding regression workflow to reference .ts test file (#588)

The test file was renamed from .js to .ts in the Phase 6 migration
but the CI workflow was not updated, causing test discovery to fail.

Author: carlos-alm

.github/workflows/embedding-regression.yml

@@ -38,4 +38,4 @@ jobs:
           key: hf-models-minilm-v1
 
       - name: Run embedding regression tests
-        run: npx vitest run tests/search/embedding-regression.test.js
+        run: npx vitest run tests/search/embedding-regression.test.ts