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

@@ -80,15 +80,15 @@ dataset_info:
           1: pos
   config_name: allocine
   splits:
-  - name: test
-    num_bytes: 11547697
-    num_examples: 20000
   - name: train
     num_bytes: 91330696
     num_examples: 160000
   - name: validation
     num_bytes: 11546250
     num_examples: 20000
+  - name: test
+    num_bytes: 11547697
+    num_examples: 20000
   download_size: 66625305
   dataset_size: 114424643
 ---