Updates to `median_survival_time_ ` in Quickstart
Updates `median_ ` to `median_survival_time_ `, to reflect change that happened in [0.23.0](https://lifelines.readthedocs.io/en/latest/Changelog.html#section-1)
@@ -62,7 +62,7 @@ After calling the :meth:`~lifelines.fitters.kaplan_meier_fitter.KaplanMeierFitte
kmf.survival_function_
kmf.cumulative_density_
- kmf.median_
+ kmf.median_survival_time_
kmf.plot_survival_function() # or just kmf.plot()
