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

@@ -99,15 +99,15 @@ dataset_info:
         - name: span_end
           dtype: int32
   splits:
-  - name: test
-    num_bytes: 9027095
-    num_examples: 1000
   - name: train
     num_bytes: 68222649
     num_examples: 8437
   - name: validation
     num_bytes: 8990945
     num_examples: 1000
+  - name: test
+    num_bytes: 9027095
+    num_examples: 1000
   download_size: 276592909
   dataset_size: 86240689
 - config_name: v2.2_active_only
@@ -183,15 +183,15 @@ dataset_info:
         - name: span_end
           dtype: int32
   splits:
-  - name: test
-    num_bytes: 5410819
-    num_examples: 1000
   - name: train
     num_bytes: 40937577
     num_examples: 8437
   - name: validation
     num_bytes: 5377939
     num_examples: 1000
+  - name: test
+    num_bytes: 5410819
+    num_examples: 1000
   download_size: 276592909
   dataset_size: 51726335
 ---