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

@@ -32,12 +32,12 @@ dataset_info:
           1: neg
           2: off-topic
   splits:
-  - name: test
-    num_bytes: 540883
-    num_examples: 2560
   - name: train
     num_bytes: 2159738
     num_examples: 10244
+  - name: test
+    num_bytes: 540883
+    num_examples: 2560
   download_size: 2593643
   dataset_size: 2700621
 - config_name: morph
@@ -52,12 +52,12 @@ dataset_info:
           1: neg
           2: off-topic
   splits:
-  - name: test
-    num_bytes: 571401
-    num_examples: 2555
   - name: train
     num_bytes: 2258128
     num_examples: 10221
+  - name: test
+    num_bytes: 571401
+    num_examples: 2555
   download_size: 2722672
   dataset_size: 2829529
 ---