Reorder split names

Reorder split names in the YAML metadata to be aligned with the order in the loading script.
See: https://github.com/huggingface/datasets/issues/5258

README.md

@@ -43,15 +43,15 @@ dataset_info:
           11: I-PRO
           12: O
   splits:
-  - name: test
-    num_bytes: 416644
-    num_examples: 1555
   - name: train
     num_bytes: 3257447
     num_examples: 12217
   - name: validation
     num_bytes: 364223
     num_examples: 1364
+  - name: test
+    num_bytes: 416644
+    num_examples: 1555
   download_size: 1659911
   dataset_size: 4038314
 ---