Remove double slash

Even without this PR, the operation works well.
However, it is better to use a single slash rather than
a double slash in the path.

roles/kubernetes/kubeadm/tasks/main.yml

@@ -78,7 +78,7 @@
 # FIXME(mattymo): Reconcile kubelet kubeconfig filename for both deploy modes
 - name: Symlink kubelet kubeconfig for calico/canal
   file:
-    src: "{{ kube_config_dir }}//kubelet.conf"
+    src: "{{ kube_config_dir }}/kubelet.conf"
     dest: "{{ kube_config_dir }}/node-kubeconfig.yaml"
     state: link
     force: yes