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

@@ -502,12 +502,12 @@ dataset_info:
           234: ltg
   config_name: WiLI-2018 dataset
   splits:
-  - name: test
-    num_bytes: 66491260
-    num_examples: 117500
   - name: train
     num_bytes: 65408201
     num_examples: 117500
+  - name: test
+    num_bytes: 66491260
+    num_examples: 117500
   download_size: 130516351
   dataset_size: 131899461
 ---