update readme

README.md

@@ -70,7 +70,7 @@ configs:
 - config_name: sentipolc
   data_files:
   - split: train
-    path: sentipolc/train.parquet
+    path: sentipolc/train.tsv
   - split: test
-    path: sentipolc/test.parquet
+    path: sentipolc/test.tsv
 ---