fixed hero tag issue

lib/pages/create_recipe_pages/metadata_page.dart

@@ -103,6 +103,7 @@ class _MetadataPageState extends State<MetadataPage> {
               ),
               Padding(padding: EdgeInsets.only(left: 10)),
               CookingDurationButton(
+                heroTag: 1,
                 selectedDuration: _recipeProvider.recipe.prepTime,
                 onDurationChanged: _recipeProvider.updatePrepTime,
               ),
@@ -117,6 +118,7 @@ class _MetadataPageState extends State<MetadataPage> {
               ),
               Padding(padding: EdgeInsets.only(left: 10)),
               CookingDurationButton(
+                heroTag: 2,
                 selectedDuration: _recipeProvider.recipe.cookTime,
                 onDurationChanged: _recipeProvider.updateCookTime,
               ),