update CMS Made Simple license

- http://svn.cmsmadesimple.org/svn/cmsmadesimple/trunk/doc/COPYING.txt

README.md

@@ -663,7 +663,7 @@ _Related: [Blogging Platforms](#blogging-platforms), [Static Site Generators](#s
 - [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`
 - [Bludit](https://www.bludit.com/) `⚠` - Simple application to build a site or blog in seconds. Bludit uses flat-files (text files in JSON format) to store posts and pages. ([Demo](https://demo.bludit.com/), [Source Code](https://github.com/bludit/bludit)) `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`
+- [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-2.0` `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`
 - [Contao](https://contao.org/) - Contao is a powerful open source CMS that allows you to create professional websites and scalable web applications. ([Source Code](https://github.com/contao/contao/)) `LGPL-3.0` `PHP`