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

@@ -39,24 +39,24 @@ dataset_info:
   - name: life_imprisonment
     dtype: bool
   splits:
-  - name: exercise_contest_test
-    num_bytes: 41057634
-    num_examples: 32508
   - name: exercise_contest_train
     num_bytes: 220112732
     num_examples: 154592
   - name: exercise_contest_valid
     num_bytes: 21702157
     num_examples: 17131
-  - name: final_test
-    num_bytes: 44194707
-    num_examples: 35922
-  - name: first_stage_test
-    num_bytes: 244335194
-    num_examples: 217016
+  - name: exercise_contest_test
+    num_bytes: 41057634
+    num_examples: 32508
   - name: first_stage_train
     num_bytes: 1779657510
     num_examples: 1710856
+  - name: first_stage_test
+    num_bytes: 244335194
+    num_examples: 217016
+  - name: final_test
+    num_bytes: 44194707
+    num_examples: 35922
   download_size: 984551626
   dataset_size: 2351059934
 ---