Fix spam-filtered scheduled posts raising an error rather than being silently ignored (#40051)

app/services/post_status_service.rb

@@ -156,7 +156,7 @@ class PostStatusService < BaseService
       raise ActiveRecord::RecordInvalid
     end
   rescue Antispam::SilentlyDrop
-    @status = @account.scheduled_status.new(scheduled_status_attributes).tap(&:delete)
+    @status = @account.scheduled_statuses.new(scheduled_status_attributes).tap(&:delete)
   end
 
   def postprocess_status!