Change min age of backup policy from 1 week to 6 days (#27200)

app/policies/backup_policy.rb

@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 
 class BackupPolicy < ApplicationPolicy
-  MIN_AGE = 1.week
+  MIN_AGE = 6.days
 
   def create?
     user_signed_in? && current_user.backups.where('created_at >= ?', MIN_AGE.ago).count.zero?