always do the submodule update

Author: gilesknap

copier.yml

@@ -20,8 +20,9 @@ _tasks:
         git remote add origin {{repo_uri}}
         git submodule add https://github.com/epics-containers/ibek-support.git
       fi
-      git submodule update --init --recursive
     when: "{{ _copier_operation == 'copy' }}"
+  - command: |
+      git submodule update --init --recursive
 
 name:
   type: str