Update samsum.py

samsum.py

@@ -36,6 +36,13 @@ class SkillDataset(datasets.GeneratorBasedBuilder):
           "split": "test",
         }
       ),
+        datasets.SplitGenerator(
+        name=datasets.Split.VALIDATION,
+        gen_kwargs={
+          "data": testing_data,
+          "split": "val",
+        }
+      ),
     ]
 
   def _generate_examples(self, data):