CHANGES.md: Updated for v4.0.0-beta.2 (#2211)
CHANGES.md: Updated for v4.0.0-beta.2 (#2211)



Former-commit-id: 50bb1b186bf999e799063f092d1ce487d5ef0119
neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox