fix(actualgraph): fix satuan plugin

agrilink_vocpro/src/app/pages/dashboard/page/actualgraph/actualgraph.component.ts

@@ -93,9 +93,10 @@ export class ActualgraphComponent implements OnInit {
             stacked: true,
             beginAtZero: false,
             ticks: {
-              callback: (value: number) => {
+              callback: (value: string | number, index: number, values: any) => {
-                return value + ' mg/L';
+                return `${value} mg/L`;
               }
+              
             }
           }
         }