Reorder split names

README.md

@@ -77,15 +77,15 @@ dataset_info:
   - name: s_expression
     dtype: string
   splits:
-  - name: test
-    num_bytes: 2167256
-    num_examples: 13231
   - name: train
     num_bytes: 69433121
     num_examples: 44337
   - name: validation
     num_bytes: 9800544
     num_examples: 6763
+  - name: test
+    num_bytes: 2167256
+    num_examples: 13231
   download_size: 17636773
   dataset_size: 81400921
 ---