Update deprecated type hinting in models (#18132)

Signed-off-by: Harry Mellor <19981378+hmellor@users.noreply.github.com>

vllm/model_executor/models/gpt2.py

@@ -18,7 +18,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 """Inference-only GPT-2 model compatible with HuggingFace weights."""
-from typing import Iterable, Optional, Set, Tuple, Union
+from collections.abc import Iterable
+from typing import Optional, Union
 
 import torch
 from torch import nn
@@ -280,10 +281,10 @@ class GPT2LMHeadModel(nn.Module, SupportsPP):
                                        sampling_metadata)
         return logits
 
-    def load_weights(self, weights: Iterable[Tuple[str,
-                                                   torch.Tensor]]) -> Set[str]:
+    def load_weights(self, weights: Iterable[tuple[str,
+                                                   torch.Tensor]]) -> set[str]:
         params_dict = dict(self.named_parameters(remove_duplicate=False))
-        loaded_params: Set[str] = set()
+        loaded_params: set[str] = set()
         for name, loaded_weight in weights:
             if ".attn.bias" in name or ".attn.masked_bias" in name:
                 # Skip attention mask.