fix type hints

Author: linglp

dags/synapse_dataset_to_croissant_minimal.py

@@ -548,7 +548,7 @@ def delete_non_current_croissant_file_in_synapse(
 
 
     @task
-    def create_and_save_jsonld(**context) -> None:
+    def create_and_save_jsonld(**context) -> List[Dict[str, str]]:
         """
         Create and save the minimal croissant JSON-LD files to S3 and links to a synapse table for all datasets in the home page of data catalog.