Fix search screen bottom nav bar using correct button highlight

lib/screens/search_screen.dart

@@ -182,8 +182,8 @@ class _SearchScreenState extends State<SearchScreen> {
           ),
         ),
       ),
-      bottomNavigationBar: AppBottomNavBar(
+      bottomNavigationBar: const AppBottomNavBar(
-        currentButton: NavBarButtons.contacts,
+        currentButton: NavBarButtons.search,
       ),
     );
   }