fix llm

Author: cblmemo

tests/skyserve/llm/service.yaml

@@ -28,7 +28,7 @@ setup: |
   fi
 
   # Install dependencies
-  pip install "fschat[model_worker,webui]==0.2.24"
+  pip install "fschat[model_worker,webui]==0.2.24" "transformers<4.48.0"
   pip install sentencepiece protobuf
 
 run: |