[mednet.scripts] Update usage examples

src/mednet/libs/classification/scripts/config.py

src/mednet/libs/classification/scripts/database.py

src/mednet/libs/classification/scripts/evaluate.py

src/mednet/libs/classification/scripts/experiment.py

src/mednet/libs/classification/scripts/predict.py

src/mednet/libs/classification/scripts/train.py

src/mednet/libs/segmentation/scripts/config.py

src/mednet/libs/segmentation/scripts/database.py

src/mednet/libs/segmentation/scripts/experiment.py

src/mednet/libs/segmentation/scripts/predict.py

src/mednet/libs/segmentation/scripts/train.py