Fix alternative relay support regression (#10398)

Fix #10324

app/lib/activitypub/activity/announce.rb

@@ -47,6 +47,10 @@ class ActivityPub::Activity::Announce < ActivityPub::Activity
     followed_by_local_accounts? || requested_through_relay? || reblog_of_local_status?
   end
 
+  def requested_through_relay?
+    super || Relay.find_by(inbox_url: @account.inbox_url)&.enabled?
+  end
+
   def reblog_of_local_status?
     status_from_uri(object_uri)&.account&.local?
   end