adding missing const

frontend/lib/pages/new_trip_location.dart

@@ -8,7 +8,7 @@ import 'package:anyway/modules/new_trip_map.dart';
 
 
 class NewTripPage extends StatefulWidget {
-  const NewTripPage({Key? key}) : super(key: key);
+  const NewTripPage({super.key});
 
   @override
   _NewTripPageState createState() => _NewTripPageState();
@@ -30,14 +30,14 @@ class _NewTripPageState extends State<NewTripPage> with ScaffoldLayout {
           children: [
             NewTripMap(trip),
             Padding(
-              padding: EdgeInsets.all(15),
+              padding: const EdgeInsets.all(15),
               child: NewTripLocationSearch(trip),
             ),
           ],
         ),
         floatingActionButton: NewTripOptionsButton(trip: trip),
       ),
-      title: Text("New Trip"),
+      title: const Text("New Trip"),
       helpTexts: [
         "Setting the start location",
         "To set the starting point, type a city name in the search bar. You can also navigate the map like you're used to and long press anywhere to set a starting point."