fix: Fixed typo

imagenette.py

@@ -151,7 +151,7 @@ class OpenFire(datasets.GeneratorBasedBuilder):
         idx = 0
         for file_path, file_obj in images:
             if file_path in files_to_keep:
-                label = _LABEL_MAP.index(file_path.split("/")[-1])
+                label = _LABEL_MAP.index(file_path.split("/")[-2])
                 yield idx, {
                     "image": {"path": file_path, "bytes": file_obj.read()},
                     "label": label,