Pinned to pytorch 2.8 (sgl-project#10)

Author: DiweiSun

Dockerfile.xpu_kernel

@@ -38,7 +38,7 @@ RUN --mount=type=secret,id=github_token \
     conda activate py${PYTHON_VERSION} && \
     # . /opt/intel/oneapi/setvars.sh --force && \
     # Install Torch
-    pip install torch torchvision torchaudio --index-url https://download.pytorch.org/whl/nightly/xpu
+    pip install torch==2.8.0 torchvision torchaudio --index-url https://download.pytorch.org/whl/xpu
 
 # Install vllm from source
 RUN --mount=type=secret,id=github_token \