Update README.md

README.md

@@ -104,7 +104,7 @@ Download a single file with datasets
 ```python
 from datasets import load_dataset
 
-dataset = load_dataset("ai-lab/MBD-mini", data_files='client_split')
+dataset = load_dataset("ai-lab/MBD-mini", data_files='client_split.tar.gz')
 ```
 
 Download a single file with huggingface_hub