Update Dockerfile (#13081)

Author: liu-shaojun

docker/llm/serving/xpu/docker/Dockerfile

@@ -53,7 +53,7 @@ RUN set -eux && \
     dpkg -i *.deb && \
     #
     # Install Intel PyTorch extension for LLM inference
-    pip install --pre --upgrade ipex-llm[xpu_2.6]==2.3.0b20250407 --extra-index-url https://download.pytorch.org/whl/xpu && \
+    pip install --pre --upgrade ipex-llm[xpu_2.6] --extra-index-url https://download.pytorch.org/whl/xpu && \
     #
     # Build torch-ccl
     mkdir -p /build && \
@@ -123,7 +123,7 @@ RUN set -eux && \
     wget https://bootstrap.pypa.io/get-pip.py -O get-pip.py && \
     python3 get-pip.py && rm get-pip.py && \
     pip install --upgrade requests argparse urllib3 && \
-    pip install --pre --upgrade ipex-llm[xpu_2.6]==2.3.0b20250407 --extra-index-url https://download.pytorch.org/whl/xpu && \
+    pip install --pre --upgrade ipex-llm[xpu_2.6] --extra-index-url https://download.pytorch.org/whl/xpu && \
     pip install transformers_stream_generator einops tiktoken && \
     pip install --upgrade colorama && \
     #