* create folder for key
The following command will fail without the folder created manually beforhand.
```
curl -fsSL https://dl.k8s.io/apt/doc/apt-key.gpg | sudo gpg --dearmor -o /etc/apt/keyrings/kubernetes-archive-keyring.gpg
```
* updated instruction
updated according to the comment in the PR
* updated mkdir part
* Updated mkdir
09e79db506