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

@@ -35,12 +35,12 @@ dataset_info:
       dtype: string
   config_name: parsinlu-repo
   splits:
-  - name: test
-    num_bytes: 681945
-    num_examples: 575
   - name: train
     num_bytes: 747679
     num_examples: 600
+  - name: test
+    num_bytes: 681945
+    num_examples: 575
   - name: validation
     num_bytes: 163185
     num_examples: 125