update readme

README.md

@@ -84,13 +84,8 @@ ubuntu@infra1:~$ maas-anvil cluster list
 ubuntu@infra1:~$ juju run maas-region/0 create-admin username=admin password=pass email=admin@maas.io ssh-import=lp:maasadmin
 ```
 
-## Cluster updates
-
-You can refresh the cluster by running the `refresh` command:
+# Managing the cluster after initial deployment
 
-```bash
-ubuntu@infra1:~$ maas-anvil refresh
-```
 
 ## Cluster updates
 
@@ -100,7 +95,7 @@ You can refresh the cluster by running the `refresh` command:
 ubuntu@infra1:~$ maas-anvil refresh
 ```
 
-# Managing the cluster after initial deployment
+This allows passing a new manifest file with `--manifest` for updating configuration options.
 
 ## Juju permission denied