- Introduced the `job_finished_indexes_total` metric for the `BackoffLimitPerIndex` feature. ([#121292](https://github.com/kubernetes/kubernetes/pull/121292), [@mimowo](https://github.com/mimowo))
- Kubeadm: supported updating certificate organization during `kubeadm certs renew` operation. ([#121841](https://github.com/kubernetes/kubernetes/pull/121841), [@SataQiu](https://github.com/SataQiu))

            "description": "The name of the admission webhook. Name should be fully qualified, e.g., imagepolicy.kubernetes.io, where \"imagepolicy\" is the name of the webhook, and kubernetes.io is the name of the organization. Required.",
            "type": "string"
          },
          "namespaceSelector": {
            "allOf": [
              {

([#625](https://github.com/kubernetes/enhancements/issues/625))

#### Additional Notable Feature Updates
- Support for go modules in Kubernetes Core.
- Continued preparation for cloud provider extraction and code organization.  The cloud provider code has been moved to kubernetes/legacy-cloud-providers for easier removal later and external consumption.

* Use arm32v7|arm64v8 images instead of the deprecated armhf|aarch64 image organizations ([#50602](https://github.com/kubernetes/kubernetes/pull/50602), [@dixudx](https://github.com/dixudx))

* Use arm32v7|arm64v8 images instead of the deprecated armhf|aarch64 image organizations ([#50602](https://github.com/kubernetes/kubernetes/pull/50602), [@dixudx](https://github.com/dixudx))

of the same package. Those elements may be
<a href="#Exported_identifiers">exported</a> and used in another package.
</p>

<h3 id="Source_file_organization">Source file organization</h3>

<p>
Each source file consists of a package clause defining the package
to which it belongs, followed by a possibly empty set of import
declarations that declare packages whose contents it wishes to use,

* `kubeadm alpha phase kubeconfig user` supports groups (organizations) to be specified in client cert. ([#62627](https://github.com/kubernetes/kubernetes/pull/62627), [@xiangpengzhao](https://github.com/xiangpengzhao))