Update tokenizer_config.json

tokenizer_config.json

@@ -17,6 +17,7 @@
   },
   "clean_up_tokenization_spaces": true,
   "eos_token": "<|endoftext|>",
+  "pad_token": "<|endoftext|>",
   "max_length": 1024,
   "model_max_length": 1024,
   "stride": 0,