commands: Make sure the hugo field is always initialized before it's used

Wrap the field to make it accessible after initialization.

Fixes #6193

commands/deploy.go

@@ -58,7 +58,7 @@ documentation.
 			if err != nil {
 				return err
 			}
-			deployer, err := deploy.New(comm.Cfg, comm.hugo.PathSpec.PublishFs)
+			deployer, err := deploy.New(comm.Cfg, comm.hugo().PathSpec.PublishFs)
 			if err != nil {
 				return err
 			}