update type hinting

paddlenlp/transformers/t5/modeling.py

@@ -15,7 +15,7 @@
 from __future__ import annotations
 
 import math
-from typing import Optional, Tuple, Union
+from typing import Optional, Tuple, Union, List
 
 import numpy as np
 import paddle
@@ -1816,7 +1816,7 @@ def forward(
         attention_mask: Optional[Tensor] = None,
         encoder_hidden_states: Optional[Tuple[Tensor]] = None,
         encoder_attention_mask: Optional[Tensor] = None,
-        cache: Optional[MultiHeadAttention.Cache] = None,
+        cache: Optional[List[MultiHeadAttention.Cache]] = None,
         use_cache: Optional[bool] = False,
         output_attentions: Optional[bool] = False,
         output_hidden_states: Optional[bool] = False,