fix typo

Signed-off-by: Bill Nell <bnell@redhat.com>

Author: bnellnm

vllm/model_executor/layers/fused_moe/shared_fused_moe.py

@@ -30,7 +30,7 @@ def __init__(
         # from being hidden from torch.compile.
         self.use_overlapped = use_overlapped and not (
             self.use_ep or self.use_flashinfer_cutlass_kernels
-        ) and self.shared_experts is not None
+        ) and self._shared_experts is not None
 
     @property
     def shared_experts(self) -> Optional[torch.nn.Module]: