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

@@ -67,12 +67,12 @@ dataset_info:
     - name: liked
       dtype: int32
   splits:
-  - name: test
-    num_bytes: 1731449
-    num_examples: 1342
   - name: train
     num_bytes: 13496125
     num_examples: 10006
+  - name: test
+    num_bytes: 1731449
+    num_examples: 1342
   download_size: 5765261
   dataset_size: 15227574
 ---