add infoxlm config

infoxlm-roberta-config.json

@@ -11,6 +11,6 @@
     "num_attention_heads": 12,
     "num_hidden_layers": 12,
 	"pad_token_id": 0,
-    "type_vocab_size": 2,
+    "type_vocab_size": 0,
     "vocab_size": 250002
 }