Remove extra character

Author: steve-hardman

content/en/docs/tasks/administer-cluster/kubeadm/change-package-repository.md

@@ -192,7 +192,7 @@ version.
    baseurl=https://pkgs.k8s.io/core:/stable:/v{{< param "version" >}}/rpm/
    enabled=1
    gpgcheck=1
-   gpgkey=https://pkgs.k8s.io/core:/stable:/v{{< param "version" >}}/rpm/repodata/repomd.xml.key
+   gpgkey=https://pkgs.k8s.io/core:/stable:/{{< param "version" >}}/rpm/repodata/repomd.xml.key
    exclude=kubelet kubeadm kubectl cri-tools kubernetes-cni
    ```