fixed site sample to be more expressive

site/src/jsMain/kotlin/TryLyngPage.kt

@@ -57,7 +57,7 @@ fun TryLyngPage(route: String) {
                 items.filter { it > 0 }.map { it * it }
             }
 
-            val data: List<Int> = [-2, -1, 0, 1, 2]
+            val data = [-2, -1, 0, 1, 2]
             println("Processed: " + process(data))
 
             // Try changing data or adding Real numbers!