Update information on Bolt CMS (#3027)

The repo moved for version 5, and the old domain's certificate has expired as of today

README.md

@@ -644,7 +644,7 @@ _Related: [Blogging Platforms](#blogging-platforms), [Static Site Generators](#s
 - [b2evolution CMS](https://b2evolution.net/) - The most integrated CMS ever: b2evolution includes everything you need to build websites for publishing, sharing and interacting with your community. ([Source Code](https://github.com/b2evolution/b2evolution)) `GPL-2.0` `PHP`
 - [Backdrop CMS](https://backdropcms.org/) - Comprehensive CMS for small to medium sized businesses and non-profits. ([Source Code](https://github.com/backdrop/backdrop)) `GPL-2.0` `PHP`
 - [BigTree CMS](https://www.bigtreecms.org/) - Straightforward, well documented, and capable written with PHP and MySQL. ([Source Code](https://github.com/bigtreecms/BigTree-CMS)) `LGPL-2.1` `PHP`
-- [Bolt CMS](https://bolt.cm/) - Open source Content Management Tool, which strives to be as simple and straightforward as possible. ([Demo](https://try.bolt.cm/), [Source Code](https://github.com/bolt/bolt)) `MIT` `PHP`
+- [Bolt CMS](https://boltcms.io/) - Open source Content Management Tool, which strives to be as simple and straightforward as possible. ([Source Code](https://github.com/bolt/core)) `MIT` `PHP`
 - [CMS Made Simple](https://www.cmsmadesimple.org/) - Open source content management system, faster and easier management of website contents, scalable for small businesses to large corporations. ([Source Code](http://svn.cmsmadesimple.org/svn/cmsmadesimple/trunk/)) `GPL-1.0` `PHP`
 - [Cockpit](https://getcockpit.com) - Simple Content Platform to manage any structured content. ([Source Code](https://github.com/agentejo/cockpit)) `MIT` `PHP`
 - [Concrete 5 CMS](https://www.concretecms.com) - Open source content management system. ([Source Code](https://github.com/concrete5/concrete5)) `MIT` `PHP`