Update config.yml
Update config.yml

Added fnirtWarpResolution parameter for the option of a user-specified FNIRT configuration
roijo/C-PAC_complexitytools,sgiavasis/C-PAC,roijo/C-PAC_complexitytools,sgiavasis/C-PAC,sgiavasis/C-PAC,roijo/C-PAC_complexitytools,danlurie/C-PAC,danlurie/C-PAC,danlurie/C-PAC,roijo/C-PAC_complexitytools,danlurie/C-PAC,sgiavasis/C-PAC