Update build_wheels_windows.yml

Author: avdivan

.github/workflows/build_wheels_windows.yml

@@ -191,7 +191,8 @@ jobs:
         cd ${{ github.workspace }}/tests
         &python -m pip install --user --no-warn-script-location (ls "../wheelhouse/opencv*.whl")
         if ($LastExitCode -ne 0) {throw $LastExitCode}
-        $cv2_path = python -c "import cv2; import os; print(os.path.dirname(cv2.__file__))"
+        $cv2_path = $(python -c "import cv2, os; print(os.path.dirname(cv2.__file__))")
+        echo $cv2_path
         Copy-Item "${{ github.workspace }}\wheelhouse\libopenblas.dll" "$cv2_path\libopenblas.dll"
         python get_build_info.py
       shell: powershell