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

@@ -40,12 +40,12 @@ dataset_info:
   - name: response_speaker
     dtype: string
   splits:
-  - name: test
-    num_bytes: 92003042
-    num_examples: 22730
   - name: train
     num_bytes: 643196978
     num_examples: 157195
+  - name: test
+    num_bytes: 92003042
+    num_examples: 22730
   - name: validation
     num_bytes: 81132088
     num_examples: 19829
@@ -64,12 +64,12 @@ dataset_info:
   - name: response_speaker
     dtype: string
   splits:
-  - name: test
-    num_bytes: 64173390
-    num_examples: 15324
   - name: train
     num_bytes: 518616402
     num_examples: 123968
+  - name: test
+    num_bytes: 64173390
+    num_examples: 15324
   - name: validation
     num_bytes: 66675909
     num_examples: 16004
@@ -88,12 +88,12 @@ dataset_info:
   - name: response_speaker
     dtype: string
   splits:
-  - name: test
-    num_bytes: 156310498
-    num_examples: 38054
   - name: train
     num_bytes: 1162655628
     num_examples: 281163
+  - name: test
+    num_bytes: 156310498
+    num_examples: 38054
   - name: validation
     num_bytes: 147940164
     num_examples: 35833