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:
           0: Not-Hope
           1: Hope
   splits:
-  - name: test
-    num_bytes: 65722
-    num_examples: 618
   - name: train
     num_bytes: 494898
     num_examples: 4940
+  - name: test
+    num_bytes: 65722
+    num_examples: 618
   download_size: 568972
   dataset_size: 560620
 ---