updated CHANGES.md
updated CHANGES.md


Former-commit-id: 35e3915c9a5b2db6746c1b52a45ea209b91eb72d
neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox