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

@@ -31,12 +31,12 @@ dataset_info:
           0: no_sarcasm
           1: sarcasm
   splits:
-  - name: test
-    num_bytes: 32480
-    num_examples: 301
   - name: train
     num_bytes: 1012030
     num_examples: 9000
+  - name: test
+    num_bytes: 32480
+    num_examples: 301
   download_size: 1008955
   dataset_size: 1044510
 ---