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

@@ -31,15 +31,15 @@ dataset_info:
     - name: text
       dtype: string
   splits:
-  - name: test
-    num_bytes: 212790
-    num_examples: 1184
   - name: train
     num_bytes: 720715
     num_examples: 3510
   - name: validation
     num_bytes: 208276
     num_examples: 1021
+  - name: test
+    num_bytes: 212790
+    num_examples: 1184
   download_size: 2083122
   dataset_size: 1141781
 ---