Replace YAML keys from int to str

Replace YAML metadata integer keys with strings, as the Hub does not support integers.
See: https://github.com/huggingface/datasets/issues/5275

README.md

@@ -21,6 +21,23 @@ task_ids:
 - intent-classification
 paperswithcode_id: sms-spam-collection-data-set
 pretty_name: SMS Spam Collection Data Set
+dataset_info:
+  features:
+  - name: sms
+    dtype: string
+  - name: label
+    dtype:
+      class_label:
+        names:
+          '0': ham
+          '1': spam
+  config_name: plain_text
+  splits:
+  - name: train
+    num_bytes: 521756
+    num_examples: 5574
+  download_size: 203415
+  dataset_size: 521756
 train-eval-index:
 - config: plain_text
   task: text-classification
@@ -69,23 +86,6 @@ train-eval-index:
     name: Recall weighted
     args:
       average: weighted
-dataset_info:
-  features:
-  - name: sms
-    dtype: string
-  - name: label
-    dtype:
-      class_label:
-        names:
-          0: ham
-          1: spam
-  config_name: plain_text
-  splits:
-  - name: train
-    num_bytes: 521756
-    num_examples: 5574
-  download_size: 203415
-  dataset_size: 521756
 ---
 
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