Fix 'loading fail' in front-end for announcement

The show action was returning an array instead of a bulletin

vendor/built_in_modules/announcement/app/controllers/panel/announcement/front_end/bulletins_controller.rb

@@ -23,8 +23,8 @@ class Panel::Announcement::FrontEnd::BulletinsController < OrbitWidgetController
   end
   
   def show
-    @bulletin = Bulletin.can_display.where.where(_id: params[:id])
-	get_categorys
+    @bulletin = Bulletin.can_display.where(_id: params[:id]).first
+    get_categorys
   end