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

@@ -28,12 +28,12 @@ dataset_info:
   - name: answer
     dtype: string
   splits:
-  - name: test
-    num_bytes: 713732
-    num_examples: 1319
   - name: train
     num_bytes: 3963202
     num_examples: 7473
+  - name: test
+    num_bytes: 713732
+    num_examples: 1319
   download_size: 4915944
   dataset_size: 4676934
 - config_name: socratic
@@ -43,12 +43,12 @@ dataset_info:
   - name: answer
     dtype: string
   splits:
-  - name: test
-    num_bytes: 936859
-    num_examples: 1319
   - name: train
     num_bytes: 5198108
     num_examples: 7473
+  - name: test
+    num_bytes: 936859
+    num_examples: 1319
   download_size: 6374717
   dataset_size: 6134967
 ---