fix: made list message to list instead of arraylist

src/main/java/edu/ntnu/idatt2001/carljgu/client/App.java

@@ -96,11 +96,7 @@ public class App extends Application {
                             "Expand the \"Show details\" button to see full stack trace.\n" +
                             "Error message: " + e.getMessage())
                     .setMessage(e.getMessage())
-                    .setListMessage(
-                            Arrays.stream(e.getStackTrace())
-                                    .map(String::valueOf)
-                                    .collect(Collectors.toCollection(ArrayList::new)
-                            ))
+                    .setListMessage(Arrays.stream(e.getStackTrace()).map(String::valueOf).toList())
                     .build().showAndWait();
             return false;
         }