workflow: fix test path

Author: aitjcize

.github/workflows/build.yml

@@ -27,7 +27,7 @@ jobs:
       - name: unittest
         run: |
           source .venv/bin/activate
-          ./scripts/ovl_unittest.py
+          ./py/ovl_unittest.py
       - name: e2e_test
         run: |
           source .venv/bin/activate