* Fix a bug affecting nested data volumes such as secret, configmap, etc. ([#57422](https://github.com/kubernetes/kubernetes/pull/57422), [@joelsmith](https://github.com/joelsmith))
* Reduce Metrics Server memory requirement ([#58391](https://github.com/kubernetes/kubernetes/pull/58391), [@kawych](https://github.com/kawych))

* Reduce Metrics Server memory requirement from 140Mi + 4Mi per node to 40Mi + 4Mi per node. ([#58391](https://github.com/kubernetes/kubernetes/pull/58391), [@kawych](https://github.com/kawych))

- If targetPort is changed that will process by service controller ([#77712](https://github.com/kubernetes/kubernetes/pull/77712), [@Sn0rt](https://github.com/Sn0rt))

### Node

- Remove PIDs cgroup controller requirement when related feature gates are disabled
  ([#79073](https://github.com/kubernetes/kubernetes/pull/79073), [@rafatio](https://github.com/rafatio))

- Register/Deregister Targets in chunks for AWS TargetGroup ([#101592](https://github.com/kubernetes/kubernetes/pull/101592), [@M00nF1sh](https://github.com/M00nF1sh)) [SIG Cloud Provider]
- Removed `/sbin/apparmor_parser` requirement for the AppArmor host validation.

### Documentation

- Give example of set-based requirement for -l/--selector flag ([#129106](https://github.com/kubernetes/kubernetes/pull/129106), [@rotsix](https://github.com/rotsix)) [SIG CLI]

  (e.g. when the Pod is controlled by a custom CRD). ([#124798](https://github.com/kubernetes/kubernetes/pull/124798), [@mimowo](https://github.com/mimowo)) [SIG Apps and Testing]
- Dropped the additional rule requirement (cronjobs/finalizers) for roles
  using kubectl create cronjobs to ensure backward compatibility. ([#124883](https://github.com/kubernetes/kubernetes/pull/124883), [@ardaguclu](https://github.com/ardaguclu))

- Kube-scheduler now retries scheduling Pods rejected by the PodTopologySpread plugin when related...

- Drop additional rule requirement (cronjobs/finalizers) in the roles who use kubectl create cronjobs to be backwards compatible ([#124883](https://github.com/kubernetes/kubernetes/pull/124883), [@ardaguclu](https://github.com/ardaguclu)) [SIG CLI]

* Remove pids cgroup controller requirement when related feature gates are disabled ([#79073](https://github.com/kubernetes/kubernetes/pull/79073), [@rafatio](https://github.com/rafatio))

- Fixes bug where OpenAPIV2 config was used instead of V3, and gives clear error message about OpenAPIV3 requirement ([#120612](https://github.com/kubernetes/kubernetes/pull/120612), [@alexzielenski](https://github.com/alexzielenski)) [SIG API Machinery]