Fix mentions of "Anonymous role"

[knstvk]

Environment

• Documentation version: 7.2
• Part of the documentation: Manual
• Existing page: https://doc.cuba-platform.com/manual-7.2/gui_anonymous_access.html https://doc.cuba-platform.com/manual-7.2/app_properties_reference.html#cuba.web.allowAnonymousAccess

Description of the bug or enhancement

Since 7.2 there is no anonymous role. Replace it in the sections above with appropriate information - perhaps you need to define another role and assign it to Anonymous user.