Fixed failing BioGPT batch generation test (#42677)

Fixed failing BioGPT batch generation test

Author: Sai-Suraj-27

tests/models/biogpt/test_modeling_biogpt.py

@@ -335,7 +335,9 @@ def test_batch_generation(self):
 
         num_paddings = inputs_non_padded.shape[-1] - inputs["attention_mask"][-1].long().sum().item()
         inputs_padded = tokenizer(sentences[1], return_tensors="pt").input_ids.to(torch_device)
-        output_padded = model.generate(input_ids=inputs_padded, max_length=model.config.max_length - num_paddings)
+        output_padded = model.generate(
+            input_ids=inputs_padded, max_length=model.generation_config.max_length - num_paddings
+        )
 
         batch_out_sentence = tokenizer.batch_decode(outputs, skip_special_tokens=True)
         non_padded_sentence = tokenizer.decode(output_non_padded[0], skip_special_tokens=True)