Allow editing media attachments for scheduled toots (#17690)

Fixes #17676

app/controllers/api/v1/media_controller.rb

@@ -31,7 +31,7 @@ class Api::V1::MediaController < Api::BaseController
   end
 
   def set_media_attachment
-    @media_attachment = current_account.media_attachments.unattached.find(params[:id])
+    @media_attachment = current_account.media_attachments.where(status_id: nil).find(params[:id])
   end
 
   def check_processing