Update config.json

make translation from arabic to arabic "because this is an arabic summarization"

config.json

@@ -48,8 +48,8 @@
   "scale_embedding": true,
   "static_position_embeddings": false,
   "task_specific_params": {
-    "translation_en_to_ro": {
-      "decoder_start_token_id": 250020
+    "translation_ar_to_ar": {
+      "decoder_start_token_id": 250001
     }
   },
   "torch_dtype": "float32",