Update README.md

updated data card

README.md

@@ -5,11 +5,11 @@ configs:
 - config_name: default
   data_files:
   - split: train
-    path: "train/*"
+    path: "train.csv"
   - split: validation
-    path: "validation/*"
+    path: "validation.csv"
   - split: test
-    path: "test/*"
+    path: "test.csv"
 
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