Removed default list from a bad copy, explicitly stating action=store which...

Removed default list from a bad copy, explicitly stating action=store which isn't necessary but just in case

apps/cli/utilities/aat_wrest/aat_wrest/wrest.py

@@ -110,7 +110,7 @@ def parser() -> argparse.ArgumentParser:
     arg_parser.add_argument(
         "--curator",
         nargs=1,
-        default=[],
+        action="store",
         required=False,
         help="Find the product information necessary to run curator on the provided product locator",
     )