updated t1_skull_strip node name, and output file to reflect output files avaliable to BET
updated t1_skull_strip node name, and output file to reflect output files avaliable to BET

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