pin to niworkflows 1.0.4
pin to niworkflows 1.0.4

Co-Authored-By: Chris Markiewicz <985f67effdb40e64a0270743b2fa0fb4d285bc9c@gmail.com>
poldracklab/fmriprep,poldracklab/fmriprep,poldracklab/preprocessing-workflow,poldracklab/preprocessing-workflow,oesteban/fmriprep,poldracklab/fmriprep,oesteban/fmriprep,oesteban/fmriprep