Fix param error (#9273)

TypeError: forward() got an unexpected keyword argument 'token_type_ids'

src/transformers/models/bert_generation/modeling_bert_generation.py

@@ -130,7 +130,7 @@ def load_tf_weights_in_bert_generation(
 
 
 class BertGenerationEmbeddings(nn.Module):
-    """Construct the embeddings from word, position and token_type embeddings."""
+    """Construct the embeddings from word and position embeddings."""
 
     def __init__(self, config):
         super().__init__()
@@ -468,7 +468,7 @@ class BertGenerationDecoder(BertGenerationPreTrainedModel):
             >>> config.is_decoder = True
             >>> model = BertGenerationDecoder.from_pretrained('google/bert_for_seq_generation_L-24_bbc_encoder', config=config)
 
-            >>> inputs = tokenizer("Hello, my dog is cute", return_tensors="pt")
+            >>> inputs = tokenizer("Hello, my dog is cute", return_token_type_ids=False, return_tensors="pt")
             >>> outputs = model(**inputs)
 
             >>> prediction_logits = outputs.logits