Update nerdctl 0.20.0 → 0.21.0

[AkihiroSuda]

https://github.com/containerd/nerdctl/releases/tag/v0.21.0

[AkihiroSuda]

@jandubois Could you create a new release (or may I create a new one)?

Planning to release Lima v0.11.1 with this.

[jandubois]

Could you create a new release (or may I create a new one)?

Of course you can, if you want to, but I've now created a PR that I will merge and tag if CI is green.

Note that I still haven't implemented support for CA certs in lima-init, so that part will still not work.

I also ran into some testing issues with the Alpine 3.16 based image, but they are probably all related to the missing sync calls (and Rancher Desktop always using limactl stop -f to stop a VM). I guess if a new release passes Lima tests, then it should be ok to include in the release.

[jandubois]

Oops, so sorry, I was totally confused when commenting here; assuming this was the PR bumping nerdctl in lima, so I could have simply merged it instead of creating a duplicate. :(

Anyways, I've pushed the 0.2.17 tag now and will create the release when CI is done.