add missing inputs to codecov action (#8)

Author: pthierry-ledger

.github/workflows/unittest.yml

@@ -40,4 +40,7 @@ jobs:
     - name: Upload coverage reports to Codecov
       uses: codecov/codecov-action@v4
       with:
+        working-directory: ${{github.workspace}}
         token: ${{ secrets.CODECOV_TOKEN }}
+        file: ${{github.workspace}}/.coverage
+        verbose: true