Update deprecated Python 3.8 typing (#13971)

vllm/v1/worker/gpu_worker.py

@@ -2,7 +2,7 @@
 """A GPU worker class."""
 import gc
 import os
-from typing import TYPE_CHECKING, Optional, Set
+from typing import TYPE_CHECKING, Optional
 
 import torch
 import torch.distributed
@@ -243,7 +243,7 @@ class Worker(WorkerBase):
     def remove_lora(self, lora_id: int) -> bool:
         return self.model_runner.remove_lora(lora_id)
 
-    def list_loras(self) -> Set[int]:
+    def list_loras(self) -> set[int]:
         return self.model_runner.list_loras()
 
     def pin_lora(self, lora_id: int) -> bool: