Add numpy because it is needed by hps_torch_plugin

docker/dockerfile.merlin.ctr

@@ -82,7 +82,7 @@ RUN pip install --no-cache-dir --upgrade pip; pip install --no-cache-dir "cmake<
                 nvidia-pyindex pybind11 pytest \
                 "scikit-learn<1.2" \
                 tritonclient[all]
-RUN pip install --no-cache-dir onnx onnxruntime pycuda
+RUN pip install --no-cache-dir numpy==1.22.4 onnx onnxruntime pycuda
 RUN pip install --no-cache-dir onnx_graphsurgeon --index-url https://pypi.ngc.nvidia.com
 
 # Triton Server