Merge pull request kubernetes#48608 from rotimislaw/patch-1

Add advice about checking package repository source (RPM)

content/en/docs/tasks/administer-cluster/kubeadm/kubeadm-upgrade.md

@@ -113,6 +113,8 @@ sudo yum list --showduplicates kubeadm --disableexcludes=kubernetes
 {{% /tab %}}
 {{< /tabs >}}
 
+If you don't see the version you expect to upgrade to, [verify if the Kubernetes package repositories are used.](/docs/tasks/administer-cluster/kubeadm/change-package-repository/#verifying-if-the-kubernetes-package-repositories-are-used)
+
 ## Upgrading control plane nodes
 
 The upgrade procedure on control plane nodes should be executed one node at a time.
@@ -337,4 +339,4 @@ these backup files will need to be cleared manually.
 `kubeadm upgrade node` does the following on worker nodes:
 
 - Fetches the kubeadm `ClusterConfiguration` from the cluster.
-- Upgrades the kubelet configuration for this node.
+- Upgrades the kubelet configuration for this node.