install scipy for pip build testing

Author: ndgrigorian

.github/workflows/build_pip.yaml

@@ -40,14 +40,12 @@ jobs:
       - name: Install MKL
         run: |
           conda install mkl-devel mkl-service
-          python -c "import sys; print(sys.executable)"
-          which python
-          python -c "import mkl; print(mkl.__file__)"
 
       - name: Build conda package
         run: |
           pip install --no-cache-dir meson-python ninja cmake cython
           pip install --no-cache-dir numpy ${{ matrix.use_pre }}
           pip install -e ".[test]" --no-build-isolation --verbose
+          pip install scipy pytest
           pip list
           python -m pytest -v mkl_fft/tests