make showlegend true by default

Author: sanjaypinna

app/[locale]/dashboard/[entityType]/[entitySlug]/dataset/[id]/edit/charts/components/ChartsVisualize.tsx

@@ -214,7 +214,7 @@ const ChartsVisualize: React.FC<VisualizationProps> = ({
       options: {
         aggregateType: resourceChart?.options?.aggregateType,
         regionColumn: resourceChart?.options?.regionColumn?.id,
-        showLegend: resourceChart?.options?.showLegend ,
+        showLegend: resourceChart?.options?.showLegend ?? true,
         timeColumn: resourceChart?.options?.timeColumn,
         valueColumn: resourceChart?.options?.valueColumn?.id,
         xAxisColumn: resourceChart?.options?.xAxisColumn?.id,