Update README.md

updated readme with folds structure

README.md

@@ -9,8 +9,22 @@ tags:
 pretty_name: buster
 size_categories:
 - 10K<n<100K
+configs:
+- config_name: default
+  data_files:
+  - split: FOLD_1
+    path: "FOLD_1.json"
+  - split: FOLD_2
+    path: "FOLD_2.json"
+  - split: FOLD_3
+    path: "FOLD_3.json"
+  - split: FOLD_4
+    path: "FOLD_4.json"
+  - split: FOLD_5
+    path: "FOLD_5.json"
+  - split: SILVER
+    path: "SILVER.json"
 dataset_info:
-  config_name: BUSTER
   features:
   - name: document_id
     dtype: string