Update security checklist admin page for settings.STORAGES.
Review Request #15091 — Created June 3, 2026 and submitted — Latest diff uploaded
During my initial Django 5.2 work I updated most of our code to use the
newSTORAGESsetting, but I missed the admin security checklist. This
change fixes it up to use the new setting.
Accessed the security checklist page and was able to see the page
instead of a traceback.