[ActivityPub] List the clone in the attributedTo attribute in clone publication
There should be a link to clone channel in the attributedTo attribute on clone's AP publication, because other clients don't understand the apparent inconsistency.
https://www.w3.org/TR/activitystreams-vocabulary/#dfn-attributedto : "Identifies one or more entities to which this object is attributed."
See https://misskey.m544.net/notes/7185209c8f737cb0a36f1e6d & https://zotadel.net/item/1246d47e-151b-4490-aab8-130d9406edf1