fix gpu image python usage

src/paddle_ocr/Dockerfile.gpu

@@ -45,17 +45,18 @@ COPY wheels/ /tmp/wheels/
 COPY requirements-gpu.txt .
 
 # Install paddlepaddle: prefer local wheel (ARM64), fallback to CUDA index (x86_64)
+# Use python -m pip to ensure packages install to Python 3.11 (not system Python 3.10)
 RUN if ls /tmp/wheels/paddlepaddle*.whl 1>/dev/null 2>&1; then \
         echo "=== Installing PaddlePaddle from local wheel (ARM64) ===" && \
-        pip install --no-cache-dir /tmp/wheels/paddlepaddle*.whl; \
+        python -m pip install --no-cache-dir /tmp/wheels/paddlepaddle*.whl; \
     else \
         echo "=== Installing PaddlePaddle from CUDA index (x86_64) ===" && \
-        pip install --no-cache-dir paddlepaddle-gpu==3.2.0 -i https://www.paddlepaddle.org.cn/packages/stable/cu126/; \
+        python -m pip install --no-cache-dir paddlepaddle-gpu==3.2.0 -i https://www.paddlepaddle.org.cn/packages/stable/cu126/; \
     fi && \
     rm -rf /tmp/wheels
 
 # Install remaining dependencies explicitly
-RUN pip install --no-cache-dir \
+RUN python -m pip install --no-cache-dir \
     paddleocr==3.3.2 \
     jiwer \
     numpy \