Update CHANGES.rst
Update CHANGES.rst

oesteban/fmriprep,poldracklab/fmriprep,poldracklab/preprocessing-workflow,oesteban/fmriprep,poldracklab/fmriprep,oesteban/preprocessing-workflow,poldracklab/preprocessing-workflow,poldracklab/fmriprep,oesteban/preprocessing-workflow,oesteban/fmriprep