correct lineplot documentation for err_kws
correct lineplot documentation for err_kws

The variable err_band isn't used by lineplot. This seems to be a typo for err_kws.
mwaskom/seaborn,mwaskom/seaborn,petebachant/seaborn,anntzer/seaborn,anntzer/seaborn,arokem/seaborn,arokem/seaborn