- Slow container runtime initialization no longer causes the System WatchDog to kill the kubelet. The Device Manager was treated as unhealthy until it began listening on its port. ([#135153](https://github.com/kubernetes/kubernetes/pull/135153), [@SergeyKanzhelev](https://github.com/SergeyKanzhelev))

- The terminationGracePeriodSeconds...

* Mirror pods must now indicate the nodeName they are bound to on creation. The mirror pod annotation is now treated as immutable and cannot be added to an existing pod, removed from a pod, or modified. ([#45775](https://github.com/kubernetes/kubernetes/pull/45775), [@liggitt](https://github.com/liggitt))

  "Additional permissions" are terms that supplement the terms of this
License by making exceptions from one or more of its conditions.
Additional permissions that are applicable to the entire Program shall
be treated as though they were included in this License, to the extent
that they are valid under applicable law.  If additional permissions
apply only to part of the Program, that part may be used separately

### Kustomize Updates in Kubectl

[Kustomize](https://github.com/kubernetes-sigs/kustomize) version in kubectl had a jump from v2.0.3 to [v4.0.5](https://github.com/kubernetes/kubernetes/pull/98946). Kustomize is now treated as a library and future updates will be less sporadic.

### Default Container Annotation

- Kube-apiserver: resolved a regression that treated `304 Not Modified` responses from aggregated API servers as internal errors ([#112529](https://github.com/kubernetes/kubernetes/pull/112529), [@liggitt](https://github.com/liggitt)) [SIG API Machinery]

- Kube-apiserver: resolved a regression that treated `304 Not Modified` responses from aggregated API servers as internal errors ([#112527](https://github.com/kubernetes/kubernetes/pull/112527), [@liggitt](https://github.com/liggitt)) [SIG API Machinery]

- Kube-apiserver: resolved a regression that treated `304 Not Modified` responses from aggregated API servers as internal errors ([#112528](https://github.com/kubernetes/kubernetes/pull/112528), [@liggitt](https://github.com/liggitt)) [SIG API Machinery]