Use new useEffect signature

Author: SebastianAigner

Full Stack Web App with Kotlin Multiplatform/05_Building_the_Frontend.md

@@ -89,7 +89,7 @@ private val scope = MainScope()
 val App = functionalComponent<RProps> { _ ->
     val (shoppingList, setShoppingList) = useState(emptyList<ShoppingListItem>())
 
-    useEffect(dependencies = listOf()) {
+    useEffect {
         scope.launch {
             setShoppingList(getShoppingList())
         }