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

@@ -124,12 +124,12 @@ dataset_info:
     dtype: string
   config_name: glucose
   splits:
-  - name: test
-    num_bytes: 355757
-    num_examples: 500
   - name: train
     num_bytes: 204605370
     num_examples: 65522
+  - name: test
+    num_bytes: 355757
+    num_examples: 500
   download_size: 30362105
   dataset_size: 204961127
 ---