kata-deploy: don't update worker pool nodes

Our cluster's life is shorter than time it takes to update nodes; for
better stability of the kata-deploy test, let's not update the nodes.

Signed-off-by: Eric Ernst <eric_ernst@apple.com>

tools/packaging/kata-deploy/action/kubernetes-containerd.json

@@ -35,6 +35,9 @@
     "servicePrincipalProfile": {
       "clientId": "",
       "secret": ""
+    },
+    "linuxProfile": {
+      "runUnattendedUpgradesOnBootstrap": false
     }
   }
 }