Move letsencrypt issuers to right flux path

ansible/group_vars/all/settings.yml.example

@@ -17,6 +17,8 @@ acme_staging: false
 enabled_applications:
   # System components, necessary for the system to function.
   - 'cert-manager'
+  - 'letsencrypt-production'
+  - 'letsencrypt-staging'
   - 'ingress'
   - 'local-storage'
   - 'single-sign-on'