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:
   - name: utterances
     sequence: string
   splits:
-  - name: test
-    num_bytes: 46514
-    num_examples: 61
   - name: train
     num_bytes: 370745
     num_examples: 482
   - name: validation
     num_bytes: 52145
     num_examples: 60
+  - name: test
+    num_bytes: 46514
+    num_examples: 61
   download_size: 524214
   dataset_size: 469404
 - config_name: processed.zh
@@ -96,15 +96,15 @@ dataset_info:
   - name: utterances
     sequence: string
   splits:
-  - name: test
-    num_bytes: 196526738
-    num_examples: 340754
   - name: train
     num_bytes: 1571262099
     num_examples: 2725989
   - name: validation
     num_bytes: 197117565
     num_examples: 340748
+  - name: test
+    num_bytes: 196526738
+    num_examples: 340754
   download_size: 2082354155
   dataset_size: 1964906402
 ---