DOC: updated batch_processing
DOC: updated batch_processing

Former-commit-id: 188966c0443706c12b459186362449b377e1014c
Former-commit-id: 08976621f1a36cee926d175900f679519cb7b9b3
3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox