added missing brace for config.json
added missing brace for config.json

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