feat(k8s): update navigation

Author: bene2k1

menu/navigation.json

@@ -1876,16 +1876,8 @@
                     "slug": "connect-cluster-kubectl"
                   },
                   {
-                    "label": "Create a new node Kapsule node pool",
-                    "slug": "create-node-pool"
-                  },
-                  {
-                    "label": "Migrate a Kapsule node pool",
-                    "slug": "migrate-node-pool"
-                  },
-                  {
-                    "label": "Delete a Kapsule node pool",
-                    "slug": "delete-node-pool"
+                    "label": "Manage Kapsule node pools",
+                    "slug": "manage-node-pools"
                   },
                   {
                     "label": "Deploy an image from Container Registry",