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

@@ -53,34 +53,34 @@ dataset_info:
     dtype:
       class_label:
         names:
-          0: QA
-          1: BH
-          2: AE
-          3: OM
-          4: SA
-          5: PL
-          6: JO
-          7: IQ
-          8: Other
-          9: EG
-          10: KW
-          11: SY
+          '0': QA
+          '1': BH
+          '2': AE
+          '3': OM
+          '4': SA
+          '5': PL
+          '6': JO
+          '7': IQ
+          '8': Other
+          '9': EG
+          '10': KW
+          '11': SY
   - name: topic
     dtype:
       class_label:
         names:
-          0: Gov
-          1: Culture
-          2: Education
-          3: Sports
-          4: Travel
-          5: Events
-          6: Business
-          7: Science
-          8: Politics
-          9: Health
-          10: Governoment
-          11: Media
+          '0': Gov
+          '1': Culture
+          '2': Education
+          '3': Sports
+          '4': Travel
+          '5': Events
+          '6': Business
+          '7': Science
+          '8': Politics
+          '9': Health
+          '10': Governoment
+          '11': Media
   splits:
   - name: test
     num_bytes: 6036