OPT: updated CSF template (previously it was spinal canal)
OPT: updated CSF template (previously it was spinal canal)

Former-commit-id: 49d7928d7c0e39beb63943bd7a4b6c4a6cc83a7e [formerly 7e4db7caef424f112cfd855e12cbaa7bc3dcfddc]
Former-commit-id: 3e87df83af7f4a5e9e9e5ade5a6c5e4c5782ac76
Former-commit-id: a2d3c7f59c4d4058c8eeb2487d6e6394920994c1
neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox