Fix remaining Rails/WhereExists cop violations, regenerate todo (#28892)

spec/services/activitypub/process_collection_service_spec.rb

@@ -265,7 +265,7 @@ RSpec.describe ActivityPub::ProcessCollectionService, type: :service do
             anything
           )
 
-          expect(Status.where(uri: 'https://example.com/users/bob/fake-status').exists?).to be false
+          expect(Status.exists?(uri: 'https://example.com/users/bob/fake-status')).to be false
         end
       end
     end