fix typo

simpitiki.py

@@ -255,7 +255,7 @@ class SIMPITIKI(datasets.GeneratorBasedBuilder):
         # The `key` is here for legacy reason (tfds) and is not important in itself.
 
         with open(filepath, encoding="utf-8") as f:
-            for id_, row in enumerate(data):
+            for id_, row in enumerate(f):
                 data = json.loads(row) 
                 yield id_, {
                         "text": data["text"],