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

@@ -17,8 +17,26 @@ task_categories:
 - text-classification
 task_ids:
 - sentiment-classification
-paperswithcode_id: null
 pretty_name: Tweets Hate Speech Detection
+dataset_info:
+  features:
+  - name: label
+    dtype:
+      class_label:
+        names:
+          '0': no-hate-speech
+          '1': hate-speech
+  - name: tweet
+    dtype: string
+  splits:
+  - name: train
+    num_bytes: 3191888
+    num_examples: 31962
+  - name: test
+    num_bytes: 1711606
+    num_examples: 17197
+  download_size: 4738708
+  dataset_size: 4903494
 train-eval-index:
 - config: default
   task: text-classification
@@ -59,25 +77,6 @@ train-eval-index:
       name: Recall weighted
       args:
         average: weighted
-dataset_info:
-  features:
-  - name: label
-    dtype:
-      class_label:
-        names:
-          0: no-hate-speech
-          1: hate-speech
-  - name: tweet
-    dtype: string
-  splits:
-  - name: train
-    num_bytes: 3191888
-    num_examples: 31962
-  - name: test
-    num_bytes: 1711606
-    num_examples: 17197
-  download_size: 4738708
-  dataset_size: 4903494
 ---
 
 # Dataset Card for Tweets Hate Speech Detection