No time to update to supported 4.1.x releases

ctools 4.1.0 was released 2 days ago. At the same time focal point 4.0.* became unsupported.

Other projects will leave releases like `4.0.4` as supported (but not recommended) so it doesn't flood Admin UIs with a scary red banner asserting a module is unsupported.

This can inject stress into teams, especially from non-technical stakeholders who are security-focused and see this error banner.

Steps to reproduce

* Install update-status module and let it track your site.
* When 4.0.4 is installed, it warns about it to be unsupported and will show a status report error.

Proposed resolution

* Give people time to update. Mark 4.0.* as unsupported only when 4.1.* was out for a while, e.g. >1 month.

Note: this is a similar issue to 🐛 No time to update to supported 2.1 releases Fixed for the focal_point module.