add escape before $basearch in repo file creation

Author: ac427

content/en/docs/tasks/tools/install-kubectl-linux.md

@@ -138,7 +138,7 @@ For example, to download version {{< param "fullversion" >}} on Linux, type:
 cat <<EOF | sudo tee /etc/yum.repos.d/kubernetes.repo
 [kubernetes]
 name=Kubernetes
-baseurl=https://packages.cloud.google.com/yum/repos/kubernetes-el7-$basearch
+baseurl=https://packages.cloud.google.com/yum/repos/kubernetes-el7-\$basearch
 enabled=1
 gpgcheck=1
 repo_gpgcheck=1