dataset name fix in script

ark_example.py

@@ -162,7 +162,7 @@ class ArkExample(datasets.GeneratorBasedBuilder):
     def _generate_examples(self, filepath: pathlib.Path):
 
         # Get all TMA paths
-        file_paths = list(pathlib.Path(filepath / "input_data").glob("*"))
+        file_paths = list(pathlib.Path(filepath / "image_data").glob("*"))
 
         # Loop over all the TMAs
         for fp in file_paths: