Updates formatting for last updated

lib/live_info_panel.dart

@@ -1,4 +1,5 @@
 import 'package:flutter/material.dart';
+import 'package:intl/intl.dart';
 
 import 'app_theme_business_object.dart';
 import 'live_info_business_object.dart';
@@ -125,7 +126,7 @@ class LiveInfoPanel extends StatelessWidget {
             Text(
               liveInfo.lastUpdatedAt == null
                   ? 'Waiting for API response...'
-                  : 'Last update: ${liveInfo.lastUpdatedAt!.toLocal().toString().substring(11, 19)} • ${snapshot?.timezone ?? '--'}',
+                  : 'Last update: ${DateFormat.yMd().format(liveInfo.lastUpdatedAt!.toLocal())} ${DateFormat.jm().format(liveInfo.lastUpdatedAt!.toLocal())} • ${snapshot?.timezone ?? '--'}',
               style: Theme.of(context).textTheme.labelSmall,
             ),
           ],