Add `configs` for restoring dataset preview

Following documentation of https://huggingface.co/docs/datasets/repository_structure, and the example of https://huggingface.co/datasets/datasets-examples/doc-yaml-1

README.md

@@ -102,6 +102,13 @@ dataset_info:
 config_names:
 - binary
 - multilabel
+configs:
+- config_name: Binary Dataset
+  data_files: "Ethos_Dataset_Binary.csv"
+  sep: ";"
+- config_name: MultiLabel Dataset
+  data_files: "Ethos_Dataset_Multi_Label.csv"
+  sep: ";"
 ---
 
 # Dataset Card for Ethos