Fix missing scope for current_user in _sidebar.html.haml (#18822)

Fixes https://github.com/mastodon/mastodon/issues/18821

Fix suggested by https://miaow.gay/@meganeko/108665430982072358

app/views/application/_sidebar.html.haml

@@ -13,4 +13,4 @@
       %h4.emojify= t('footer.trending_now')
 
       - trends.each do |tag|
-        = react_component :hashtag, hashtag: ActiveModelSerializers::SerializableResource.new(tag, serializer: REST::TagSerializer).as_json
+        = react_component :hashtag, hashtag: ActiveModelSerializers::SerializableResource.new(tag, serializer: REST::TagSerializer, scope: current_user, scope_name: :current_user).as_json