I cannot install nvidia-cudnn 8.2.1 using nvidia-pyindex

I am trying to install cudnn(v8.2.1) via pip on ubuntu 18.04 with the command bellow.

$ pip3 install nvidia-pyindex
$ pip3 install nvidia-cudnn~=8.2.1
Defaulting to user installation because normal site-packages is not writeable
Looking in indexes: https://pypi.org/simple, https://pip.repos.neuron.amazonaws.com, https://pypi.ngc.nvidia.com
ERROR: Could not find a version that satisfies the requirement nvidia-cudnn~=8.2.1 (from versions: 0.0.1.dev4, 0.0.1.dev5,,,,,,,,,,,
ERROR: No matching distribution found for nvidia-cudnn~=8.2.1
WARNING: You are using pip version 21.2.4; however, version 21.3.1 is available.
You should consider upgrading via the '/usr/bin/python3 -m pip install --upgrade pip' command.

However, it failed.
I checked the original url(https://pypi.ngc.nvidia.com/nvidia-cudnn).
There is no nvidia-cudnn at that version, but there are older versions.
Will you plan to update the content about nvidia-cudnn in the server?