Add ca-certificates to prerequisites for Container Toolkit

[shenxianpeng]

When following the NVIDIA Container Toolkit installation guide, the installation may fail with the following error:

 > [3/4] RUN curl -fsSL https://nvidia.github.io/libnvidia-container/gpgkey | gpg --dearmor -o /usr/share/keyrings/nvidia-container-toolkit-keyring.gpg   && distribution=$(. /etc/os-release;echo $ID$VERSION_ID)   && echo "deb [signed-by=/usr/share/keyrings/nvidia-container-toolkit-keyring.gpg] https://nvidia.github.io/libnvidia-container/stable/deb/$(dpkg --print-architecture) /" |     tee /etc/apt/sources.list.d/nvidia-container-toolkit.list   && apt-get update:
0.145 curl: (77) error setting certificate file: /etc/ssl/certs/ca-certificates.crt
0.146 gpg: no valid OpenPGP data found.

This issue occurs when ca-certificates is not installed, causing HTTPS requests to fail.
Adding ca-certificates to the apt-get install prerequisites resolves the problem.