Update README.md

README.md

@@ -9,9 +9,9 @@ size_categories:
 
 This dataset contains stock market data from the year 2018. It is divided into three parts:
 
-- **Train**: `train_filtered.parquet`
-- **Test**: `test_filtered.parquet`
-- **Validation**: `validation_filtered.parquet`
+- **Train**: `train_filtered`
+- **Test**: `test_filtered`
+- **Validation**: `validation_filtered`
 
 
 ## Usage