Apply config changes from database updates

Ref #243

config/webform.webform.migrations.yml

@@ -13,7 +13,8 @@ archive: false
 id: migrations
 title: 'Migrations training'
 description: 'A webform for people joining our migration trainings announcement list.'
-category: Mailchimp
+categories:
+  - Mailchimp
 elements: |
   your_email:
     '#type': email
@@ -113,6 +114,8 @@ settings:
   wizard_toggle: false
   wizard_toggle_show_label: ''
   wizard_toggle_hide_label: ''
+  wizard_page_type: container
+  wizard_page_title_tag: h2
   preview: 0
   preview_label: ''
   preview_title: ''