Update promo_edit_field_handler to clarify callback data structure

- Changed the variable name from 'i18n' to 'action' for better readability and understanding of the callback data being processed.
- Ensured that the promo ID and field to edit are still correctly extracted and updated in the state management.

bot/handlers/admin/promo/manage.py

@@ -379,7 +379,7 @@ async def promo_edit_field_handler(callback: types.CallbackQuery, state: FSMCont
     if not i18n or not callback.message or not current_lang: return
     _ = lambda key, **kwargs: i18n.gettext(current_lang, key, **kwargs)
     
-    _, field, promo_id_str = callback.data.split(":")
+    action, field, promo_id_str = callback.data.split(":")
     await state.update_data(promo_id=int(promo_id_str), field_to_edit=field)
     
     prompts = {