Update dataset_infos.json

dataset_infos.json

@@ -3,12 +3,12 @@
             "features": {
             "name": {
                 "dtype": "string",
-                "id": null,
+                "id": 0,
                 "_type": "Value"
             },
             "age": {
                 "dtype": "int32",
-                "id": null,
+                "id": 1,
                 "_type": "Value"
             }
   }