update link to metrics for samples

sessions/forecast-evaluation.qmd

@@ -152,7 +152,7 @@ sc_scores
 ::: {.callout-note collapse="true"}
 ## Learning more about the output of `score()`
 
-See the documentation for `?metrics_sample` for information on the default metrics for forecasts that are represented as samples (in our case the samples generated by the stan model).
+See the documentation for `?get_metrics.forecast_sample` for information on the default metrics for forecasts that are represented as samples (in our case the samples generated by the stan model).
 :::
 
 ### At a glance