fix https://huggingface.co/datasets/pie/aae2/discussions/1

aae2.py

@@ -144,7 +144,7 @@ class ArgumentAnnotatedEssaysV2(BratBuilder):
         dataset_variant: {"url": URL, "split_paths": SPLIT_PATHS}
         for dataset_variant in [BratBuilder.DEFAULT_CONFIG_NAME, None]
     }
-
+    BUILDER_CONFIG_CLASS = ArgumentAnnotatedEssaysV2Config
     BUILDER_CONFIGS = [
         ArgumentAnnotatedEssaysV2Config(
             name=BratBuilder.DEFAULT_CONFIG_NAME,