Fix link to certified kubernetes badge (#7555)

docs/reference/setup-tools/kubeadm/kubeadm.md

@@ -5,7 +5,7 @@ approvers:
 - jbeda
 title: Overview of kubeadm
 ---
-<img src="https://raw.githubusercontent.com/cncf/artwork/master/kubernetes/certified-kubernetes/versionless/color/certified_kubernetes_color.png" align="right" width="150px">Kubeadm is a tool built to provide `kubeadm init` and `kubeadm join` as best-practice “fast paths” for creating Kubernetes clusters. 
+<img src="https://raw.githubusercontent.com/cncf/artwork/master/kubernetes/certified-kubernetes/versionless/color/certified-kubernetes-color.png" align="right" width="150px">Kubeadm is a tool built to provide `kubeadm init` and `kubeadm join` as best-practice “fast paths” for creating Kubernetes clusters. 
 
 kubeadm performs the actions necessary to get a minimum viable cluster up and running. By design, it cares only about bootstrapping, not about provisioning machines. Likewise, installing various nice-to-have addons, like the Kubernetes Dashboard, monitoring solutions, and cloud-specific addons, is not in scope.
 

docs/setup/independent/create-cluster-kubeadm.md

@@ -9,7 +9,7 @@ title: Using kubeadm to Create a Cluster
 
 {% capture overview %}
 
-<img src="https://raw.githubusercontent.com/cncf/artwork/master/kubernetes/certified-kubernetes/versionless/color/certified_kubernetes_color.png" align="right" width="150px">**kubeadm** is a toolkit that helps you bootstrap a best-practice Kubernetes
+<img src="https://raw.githubusercontent.com/cncf/artwork/master/kubernetes/certified-kubernetes/versionless/color/certified-kubernetes-color.png" align="right" width="150px">**kubeadm** is a toolkit that helps you bootstrap a best-practice Kubernetes
 cluster in an easy, reasonably secure and extensible way. It also supports
 managing [Bootstrap Tokens](/docs/admin/bootstrap-tokens/) for you and upgrading/downgrading clusters.