Update deprecated Python 3.8 typing (#13971)

tests/encoder_decoder/test_e2e_correctness.py

@@ -3,7 +3,7 @@
 
 Run `pytest tests/encoder_decoder/test_e2e_correctness.py`.
 """
-from typing import List, Optional, Tuple
+from typing import Optional
 
 import pytest
 from transformers import AutoModelForSeq2SeqLM
@@ -22,7 +22,7 @@ LIST_ENC_DEC_SUPPORTED_BACKENDS = [
 
 
 def vllm_to_hf_output(
-    vllm_output: Tuple[List[int], str, Optional[SampleLogprobs]],
+    vllm_output: tuple[list[int], str, Optional[SampleLogprobs]],
     decoder_prompt_type: DecoderPromptType,
 ):
     """Sanitize vllm output to be comparable with hf output."""