Fix wrong message time(12:XX pm showing as 00:XX pm)

lib/utils/date_time_extension.dart

@@ -34,8 +34,8 @@ extension DateTimeExtension on DateTime {
   /// Returns a simple time String.
   /// TODO: Add localization
   String localizedTimeOfDay(BuildContext context) {
-    return L10n.of(context).timeOfDay(
-        _z(hour % 12), _z(hour), _z(minute), hour > 11 ? 'pm' : 'am');
+    return L10n.of(context).timeOfDay(_z(hour == 12 ? hour : hour % 12),
+        _z(hour), _z(minute), hour > 11 ? 'pm' : 'am');
   }
 
   /// Returns [localizedTimeOfDay()] if the ChatTime is today, the name of the week