Fix dataset card split metadata keys (#5)

- Fix dataset card split metadata keys (ec9bd5e398219c7f5b1bc8773b8931dd8e142253)

README.md

@@ -97,7 +97,7 @@ dataset_info:
         dtype: float64
     splits:
       - name: summary
-        num_rows: 3147
+        num_examples: 3147
         num_bytes: 694254
   - config_name: distributional
     features:
@@ -167,7 +167,7 @@ dataset_info:
         dtype: float64
     splits:
       - name: summary
-        num_rows: 245
+        num_examples: 245
         num_bytes: 70836
   - config_name: mse_validation
     features:
@@ -273,7 +273,7 @@ dataset_info:
         dtype: float64
     splits:
       - name: summary
-        num_rows: 28
+        num_examples: 28
         num_bytes: 40940
 ---