Address pandas FutureWarning in climate_assessment/climate/post_process.py:164 #83
Description
/home/hackstock/Documents/code/climate-processor/.venv/lib/python3.12/site-packages/climate_assessment/climate/post_process.py:164: FutureWarning: Series.__getitem__ treating keys as positions is deprecated. In a future version, integer keys will always be treated as labels (consistent with DataFrame behavior). To access a value by position, use `ser.iloc[pos]`
if not np.isclose(shifts, shifts[0], atol=5 * 1e-3).all():