Fix continuous deployment for HRO Cloud

Part of #150 (closed)

It just add/use the hro-cloud grid name in the update-deployment script/command.

W/o this, the deployment command called on hro-cloud nodes will likely try to get the production grid config!

morph/grid/hro-cloud/grid.nix

@@ -24,7 +24,7 @@ let
     # Configure deployment management authorization for all systems in the grid.
     services.private-storage.deployment = {
       authorizedKey = builtins.readFile "${config.grid.publicKeyPath}/deploy_key.pub";
-      gridName = "production";
+      gridName = "hro-cloud";
     };
   };
   payments = {