DOC: updated batch_processing
DOC: updated batch_processing

Former-commit-id: 9191938dd3eef8e9d2128838ce5f4c9679745c8b
Former-commit-id: e79bba01c6916059f5b5418fd41d4956de419eb5
3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox