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

@@ -36,12 +36,12 @@ dataset_info:
           7: боловсрол
           8: байгал орчин
   splits:
-  - name: test
-    num_bytes: 64451731
-    num_examples: 15133
   - name: train
     num_bytes: 255275842
     num_examples: 60528
+  - name: test
+    num_bytes: 64451731
+    num_examples: 15133
   download_size: 320395067
   dataset_size: 319727573
 ---