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

@@ -25,15 +25,15 @@ dataset_info:
   - name: wellFormedAnswers
     sequence: string
   splits:
-  - name: test
-    num_bytes: 41020711
-    num_examples: 9650
-  - name: train
-    num_bytes: 350884446
-    num_examples: 82326
   - name: validation
     num_bytes: 42710107
     num_examples: 10047
+  - name: train
+    num_bytes: 350884446
+    num_examples: 82326
+  - name: test
+    num_bytes: 41020711
+    num_examples: 9650
   download_size: 168698008
   dataset_size: 434615264
 - config_name: v2.1
@@ -57,15 +57,15 @@ dataset_info:
   - name: wellFormedAnswers
     sequence: string
   splits:
-  - name: test
-    num_bytes: 406197152
-    num_examples: 101092
-  - name: train
-    num_bytes: 3466972085
-    num_examples: 808731
   - name: validation
     num_bytes: 414286005
     num_examples: 101093
+  - name: train
+    num_bytes: 3466972085
+    num_examples: 808731
+  - name: test
+    num_bytes: 406197152
+    num_examples: 101092
   download_size: 1384271865
   dataset_size: 4287455242
 ---