Revert "Remove duplicate "Legend values" heading" (#75659)

Revert "Remove duplicate "Legend values" heading (#75614)"

This reverts commit 030e891b3f.

docs/sources/panels-visualizations/visualizations/pie-chart/index.md

@@ -79,6 +79,8 @@ The following example shows a pie chart with **Name** and **Percent** labels dis
 
 {{< docs/shared lookup="visualizations/tooltip-mode.md" source="grafana" version="<GRAFANA VERSION>" >}}
 
+{{< docs/shared lookup="visualizations/legend-mode.md" source="grafana" version="<GRAFANA VERSION>" >}}
+
 ### Legend values
 
 Select values to display in the legend. You can select more than one.
@@ -86,7 +88,7 @@ Select values to display in the legend. You can select more than one.
 - **Percent:** The percentage of the whole.
 - **Value:** The raw numerical value.
 
-For more information about the legend, refer to [Configure a legend]{{< relref "../../configure-legend" >}}).
+For more information about the legend, refer to [Configure a legend](../configure-legend/).
 
 {{% docs/reference %}}
 [Calculation types]: "/docs/grafana/ -> /docs/grafana/<GRAFANA VERSION>/panels-visualizations/calculation-types"