Fix ActionView::MissingTemplate error on "Save and Add"

Author: amatsuda

app/views/staff/time_slots/create.turbo_stream.haml

@@ -3,7 +3,7 @@
 
 %turbo-stream{action: 'datatable-add', target: 'organizer-time-slots'}
   %template
-    = render(time_slot_decorated)
+    = render(partial: 'time_slot', formats: [:html], object: time_slot_decorated)
 
 = turbo_stream.update 'flash' do
   = show_flash

app/views/staff/time_slots/update.turbo_stream.haml

@@ -2,7 +2,7 @@
 
 %turbo-stream{action: 'datatable-update', target: 'organizer-time-slots', 'row-id': @time_slot.id}
   %template
-    = render(time_slot_decorated)
+    = render(partial: 'time_slot', formats: [:html], object: time_slot_decorated)
 
 = turbo_stream.update 'flash' do
   = show_flash