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

@@ -44,12 +44,12 @@ dataset_info:
           14: resume
           15: memo
   splits:
-  - name: test
-    num_bytes: 4863300853
-    num_examples: 40000
   - name: train
     num_bytes: 38816373360
     num_examples: 320000
+  - name: test
+    num_bytes: 4863300853
+    num_examples: 40000
   - name: validation
     num_bytes: 4868685208
     num_examples: 40000