Expired APT Repository Key

As I tried to setup the Container Toolkit Repository (see https://docs.nvidia.com/datacenter/cloud-native/container-toolkit/latest/install-guide.html) on a Debian system, I got errors with the APT package manager, due to no accepted signature/public key. When checking the key, it turns out, that the key is expired.

$ curl -fsSL https://nvidia.github.io/libnvidia-container/gpgkey | gpg                                                                                                                                                    

gpg: WARNING: no command supplied.  Trying to guess what you mean ...
pub   rsa4096 2017-09-28 [SCE]
      C95B321B61E88C1809C4F759DDCAE044F796ECB0
uid           NVIDIA CORPORATION (Open Source Projects) <cudatools@nvidia.com>
sub   rsa2048 2019-09-18 [S] [expired: 2021-06-16]

It would be great if you could update the key expiry date and distribute the than valid key.

Start with the Container Toolkit installation guide and the key served by https://nvidia.github.io/libnvidia-container/gpgkey; verify how the repository setup obtains and uses that key. Done means the distributed signing key is valid and Debian APT accepts packages from the Container Toolkit Repository without a signature or expired-key error.