fix portfolio value history chart

src/components/PortfolioValueHistory.svelte

@@ -155,6 +155,9 @@
 					legend: {
 						display: false
 					},
+					datalabels: {
+						display: false
+					},
 					tooltip: {
 						backgroundColor: 'rgba(0, 0, 0, 0.8)',
 						titleColor: 'white',