Update README split pointers: default/test_clean

README.md

@@ -3288,6 +3288,9 @@ configs:
     - 'default/small/small-00029-of-00032.parquet'
     - 'default/small/small-00030-of-00032.parquet'
     - 'default/small/small-00031-of-00032.parquet'
+  - split: 'test_clean'
+    path:
+    - 'default/test_clean/test_clean-00000-of-00001.parquet'
 ---
 
 # Libriheavy