CHARTS-139: Fix zero value tooltip in conversion funnel chart. (#46106)

* CHARTS-139: Fix zero value tooltip.

* changelog

Author: halfo

projects/js-packages/charts/changelog/fix-CHARTS-139-leaderboard-tooltip-zero-value-format-fix

@@ -0,0 +1,4 @@
+Significance: patch
+Type: fixed
+
+Charts: Fix zero value tooltip in conversion funnel chart.

projects/js-packages/charts/src/components/conversion-funnel-chart/conversion-funnel-chart.tsx

@@ -244,7 +244,7 @@ const ConversionFunnelChartInternal: FC< ConversionFunnelChartProps > = ( {
 			<div className={ styles[ 'tooltip-title' ] }>{ step.label }</div>
 			<div className={ styles[ 'tooltip-content' ] }>
 				{ formatPercentage( step.rate ) }
-				{ step.count && ` • ${ step.count.toLocaleString() } items` }
+				{ ` • ${ step.count ?? 'no' } items` }
 			</div>
 		</>
 	);