Fix item count (#38402)

app/serializers/activitypub/featured_collection_serializer.rb

@@ -32,7 +32,7 @@ class ActivityPub::FeaturedCollectionSerializer < ActivityPub::Serializer
   end
 
   def total_items
-    object.collection_items.size
+    object.accepted_collection_items.size
   end
 
   def published

spec/serializers/activitypub/featured_collection_serializer_spec.rb

@@ -76,6 +76,7 @@ RSpec.describe ActivityPub::FeaturedCollectionSerializer do
     it 'only includes accepted items' do
       items = subject['orderedItems']
 
+      expect(subject['totalItems']).to eq 1
       expect(items.size).to eq 1
       expect(items.first['id']).to eq ActivityPub::TagManager.instance.uri_for(collection_items.last)
     end