Bump arctic-inference requirement (#28174)

Co-authored-by: Aurick Qiao <aurick.qiao@snowflake.com>
Co-authored-by: Wentao Ye <44945378+yewentao256@users.noreply.github.com>

vllm/config/speculative.py

@@ -469,7 +469,7 @@ class SpeculativeConfig:
         if not has_arctic_inference():
             raise ImportError(
                 "Arctic Inference is required for suffix decoding. "
-                "Install via `pip install arctic-inference==0.1.0`."
+                "Install via `pip install arctic-inference==0.1.1`."
             )
         if self.num_speculative_tokens is None:
             # Suffix decoding decides the actual number of speculative tokens