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

@@ -49,12 +49,12 @@ dataset_info:
             3: Goggles
             4: Mask
   splits:
-  - name: test
-    num_bytes: 4172739
-    num_examples: 29
   - name: train
     num_bytes: 240481281
     num_examples: 1000
+  - name: test
+    num_bytes: 4172739
+    num_examples: 29
   download_size: 238482705
   dataset_size: 244654020
 ---