update to hf->tf args

pytorch_pretrained_bert/convert_hf_checkpoint_to_tf.py

@@ -108,4 +108,4 @@ if __name__ == "__main__":
     model = BertModel(
         config=BertConfig(args.config_file_path)
     ).from_pretrained(args.pytorch_model_name, cache_dir=args.pytorch_model_dir)
-    convert_hf_checkpoint_to_tf(model=model, ckpt_dir=args.tf_checkpoint_dir)
\ No newline at end of file
+    convert_hf_checkpoint_to_tf(model=model, ckpt_dir=args.tf_checkpoint_dir)