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

@@ -47,12 +47,12 @@ dataset_info:
           5: sadness
           6: surprise
   splits:
-  - name: test
-    num_bytes: 655844
-    num_examples: 1000
   - name: train
     num_bytes: 7296715
     num_examples: 11118
+  - name: test
+    num_bytes: 655844
+    num_examples: 1000
   - name: validation
     num_bytes: 673943
     num_examples: 1000