-sce calibrate flag not working

[brunofavs]

Due to removing the "output_folder" key from argparse this functionality broke.

atom/atom_calibration/src/atom_calibration/calibration/objective_function.py

Line 161 in e0652a5

with open(args['output_folder'] + '/calibration_errors.csv', 'w', newline='') as f_output:

I did a small hotfix just to get it working, I will fix it properly before merging to main