fix: makes ical url publicly accessible if user has option enabled

config/packages/security.yaml

@@ -45,6 +45,7 @@ security:
     # Easy way to control access for large sections of your site
     # Note: Only the *first* access control that matches will be used
     access_control:
+        - { path: ^/monitors/ical.ics, roles: PUBLIC_ACCESS }
         - { path: ^/reset-password, roles: PUBLIC_ACCESS }
         - { path: ^/getting-started, roles: PUBLIC_ACCESS }
         - { path: ^/register, roles: PUBLIC_ACCESS }