fix(k8s): close message

Author: bene2k1

pages/kubernetes/how-to/upgrade-kapsule-new-node-image-system.mdx

@@ -34,6 +34,7 @@ You can upgrade your Scaleway Kubernetes Kapsule cluster to the new image system
   During the upgrade process, all cluster nodes will be replaced with new ones.
   Any data stored locally on the nodes (for example, using `hostPath`) will be **permanently lost**.
   Data stored in **Persistent Volumes (PVs)** will **not** be affected.
+</Message>
 
 ### Console upgrade