DOC: updated batch_processing
DOC: updated batch_processing

Former-commit-id: de39b7366c281b54113f62227a77f642349617ec
Former-commit-id: 6857027383c55fa1448ab2c2aba20cd9581456a4
3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox