fix typo

Author: Vahid Tavanashad

CHANGES.rst

@@ -10,7 +10,7 @@ migrate from `setup.py` to `pyproject.toml`
 includes support in virtual environment out of the box
 
 the original `mkl_fft.rfft` and `mkl_fft.irfft` are renamed to `mkl_fft.rfftpack` and `mkl_fft.irfftpack`, since they
-replicate the behavior from the deprectaed `scipy.fftapck` module.
+replicate the behavior from the deprectaed `scipy.fftpack` module.
 
 `mkl_fft.rfft_numpy`, `mkl_fft.irfft_numpy`, `mkl_fft.rfft2_numpy`, `mkl_fft.irfft2_numpy`, `mkl_fft.rfftn_numpy`
 and `mkl_fft.irfftn_numpy` are renamed to `mkl_fft.rfft`, `mkl_fft.irfft`, `mkl_fft.rfft2`, `mkl_fft.irfft2`, `mkl_fft.rfftn`