Updated method name

Author: 3coins

jupyter_server_documents/outputs/manager.py

@@ -63,7 +63,7 @@ def get_outputs(self, file_id, cell_id):
                 outputs.append(output)
 
         if has_more_files:
-            placeholder = self._create_outputs_placeholder(file_id, cell_id)
+            placeholder = self._create_outputs_link(file_id, cell_id)
             outputs.append(json.dumps(placeholder))
 
         return outputs