Update provenance_schema.yaml

Author: yuanzhou

src/schema/provenance_schema.yaml

@@ -672,7 +672,7 @@ ENTITIES:
       thumbnail_file:
         generated: true
         type: json_string
-        description: "The dataset thumbnail file detail. Stored in db as a stringfied json, e.g., {'filename': 'thumbnail.jpg', 'file_uuid': 'dadasdasdadda'}"
+        description: "The thumbnail file detail. Stored in db as a stringfied json, e.g., {'filename': 'thumbnail.jpg', 'file_uuid': 'dadasdasdadda'}"
         # The updated_peripherally tag is a temporary measure to correctly handle any attributes
         # which are potentially updated by multiple triggers
         updated_peripherally: true