Move WriteFreely to Blogging-Platforms (#3425)

WriteFreely is highly specialized for blogging, rather than general CMS.  In "Blogging-Platforms" it would be more discoverable by those to whom it would be of interest.

README.md

@@ -232,6 +232,7 @@ _See also: [WeblogMatrix](https://www.weblogmatrix.org/)_
 - [Plume](https://joinplu.me/) - Federated blogging engine, based on ActivityPub. ([Source Code](https://github.com/Plume-org/Plume)) `AGPL-3.0` `Rust`
 - [PluXml](https://pluxml.org) - XML-based blog/CMS platform. ([Source Code](https://github.com/pluxml/PluXml)) `GPL-1.0` `PHP`
 - [Serendipity](https://docs.s9y.org/) - Serendipity (s9y) is a highly extensible and customizable PHP blog engine using Smarty templating. ([Source Code](https://github.com/s9y/serendipity)) `BSD-3-Clause` `PHP`
+- [WriteFreely](https://writefreely.org) - Writing software for starting a minimalist, federated blog — or an entire community. ([Source Code](https://github.com/writefreely/writefreely)) `AGPL-3.0` `Go`
 
 
 ### Booking and Scheduling
@@ -705,7 +706,6 @@ _Related: [Blogging Platforms](#blogging-platforms), [Static Site Generators](#s
 - [WinterCMS](https://wintercms.com/) - Speedy and secure content management system built on the Laravel PHP framework. ([Source Code](https://github.com/wintercms/winter)) `MIT` `PHP`
 - [WonderCMS](https://www.wondercms.com) - WonderCMS is the smallest flat file CMS since 2008. ([Demo](https://www.wondercms.com/demo), [Source Code](https://github.com/robiso/wondercms)) `MIT` `PHP`
 - [WordPress](https://wordpress.org/) - World's most-used blogging and CMS engine. ([Source Code](https://github.com/WordPress/WordPress)) `GPL-2.0` `PHP`
-- [WriteFreely](https://writefreely.org) - Writing software for starting a minimalist, federated blog — or an entire community. ([Source Code](https://github.com/writefreely/writefreely)) `AGPL-3.0` `Go`
 
 
 ### DNS