fix parquet path

prepare.py

@@ -22,7 +22,7 @@ if __name__ == "__main__":
     cache_file = "dataset_cache.parquet"
     if os.path.exists(cache_file):
         # Load dataset from cache
-        df = pd.read_parquet('cifar100-enriched-cv.parquet')
+        df = pd.read_parquet(cache_file)
         print("Dataset loaded from cache.")
     else:
         # Load dataset using datasets.load_dataset()