[en]Update k8s.gcr.io to registry.k8s.io (#39511)

* [en]Update k8s.gcr.io to registry.k8s.io

* Mention about k8s.gcr.io registry change.

* Added note on k8s.gcr.io registry change

* fix grammer

Author: T-Lakshmi

content/en/blog/_posts/2019-12-02-gardener-project-update.md

@@ -47,7 +47,7 @@ The essential idea is that so-called **seed** clusters are used to host the
 control planes of end-user clusters (botanically named **shoots**). \
 Gardener provides vanilla Kubernetes clusters as a service independent of the
 underlying infrastructure provider in a homogenous way, utilizing the upstream
-provided `k8s.gcr.io/*` images as open distribution. The project is built
+provided `k8s.gcr.io/*` images as open distribution _(update: `k8s.gcr.io` has been deprecated in favor of `registry.k8s.io`)._ The project is built
 entirely on top of Kubernetes extension concepts, and as such adds a custom API
 server, a controller-manager, and a scheduler to create and manage the lifecycle
 of Kubernetes clusters. It extends the Kubernetes API with custom resources,

content/en/blog/_posts/2021-04-13-kube-state-metrics-goes-v-2-0.md

@@ -35,7 +35,7 @@ So without further ado, here is the list of more noteworthy user-facing breaking
 * Metric labels that relate to Kubernetes were converted to snake_case.
 * If you are importing kube-state-metrics as a library, we have updated our go module path to `k8s.io/kube-state-metrics/v2`
 * All deprecated stable metrics were removed as per the [notice in the v1.9 release](https://github.com/kubernetes/kube-state-metrics/tree/release-1.9/docs#metrics-deprecation).
-* `quay.io/coreos/kube-state-metrics` images will no longer be updated. `k8s.gcr.io/kube-state-metrics/kube-state-metrics` is the new canonical location.
+* `quay.io/coreos/kube-state-metrics` images will no longer be updated. `k8s.gcr.io/kube-state-metrics/kube-state-metrics` is the new canonical location _(update: `k8s.gcr.io` has been deprecated in favor of `registry.k8s.io`)._
 * The helm chart that is part of the kubernetes/kube-state-metrics repository is deprecated. https://github.com/prometheus-community/helm-charts will be its new location. 
 
 For the full list of v2.0 release changes includes features, bug fixes and other breaking changes see the full [CHANGELOG](https://github.com/kubernetes/kube-state-metrics/blob/master/CHANGELOG.md).