Fix field type for Dict in add_new_custom_field function

src/backend/langflow/interface/custom/utils.py

@@ -155,6 +155,9 @@ def add_new_custom_field(
     field_value = field_config.pop("value", field_value)
     field_advanced = field_config.pop("advanced", False)
 
+    if field_type == "Dict":
+        field_type = "dict"
+
     if field_type == "bool" and field_value is None:
         field_value = False