fixed hero tag issue

lib/widgets/cooking_duration_button.dart

@@ -9,12 +9,15 @@ class CookingDurationButton extends StatelessWidget {
     required this.selectedDuration,
     required this.onDurationChanged,
     this.label = '',
+    required this.heroTag,
   });
 
   final String label;
   final void Function(Duration duration) onDurationChanged;
   final Duration selectedDuration;
 
+  final Object heroTag;
+
   @override
   Widget build(BuildContext context) {
     String text = label;
@@ -22,6 +25,7 @@ class CookingDurationButton extends StatelessWidget {
       text = durationToFormattedString(selectedDuration);
     }
     return FloatingActionButton.extended(
+      heroTag: heroTag,
       onPressed: () => showDialog(
         context: context,
         builder: (context) => _getDurationDialog(