Update README.md

dbu · web-flow · commit 741174f873eb · 2021-09-16T16:41:37.000+02:00
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+# This repository is no longer maintained
+
+Due to lack of interest, we had to decide to discontinue this repository. 
+The CMF project focusses on the [Routing component](https://github.com/symfony-cmf/routing) and [RoutingBundle](https://github.com/symfony-cmf/routing-bundle), which are still in active use by other projects.
+
+This repository will no longer be upgraded and marked as abandoned, but will be kept available for legacy projects or if somebody wants to experiment with the CMF.
+
+You can contact us in the #symfony_cmf channel of the [Symfony devs slack](https://symfony.com/slack).
+
 [![Build Status](https://travis-ci.org/symfony-cmf/symfony-cmf-docs.svg?branch=master)](https://travis-ci.org/symfony-cmf/symfony-cmf-docs)
 
 # Symfony CMF Documentation
 
 This is the document of the [Symfony Content Management Framework (CMF)](http://cmf.symfony.com/) and is licensed under the Creative Commons [Attribution-Share Alike 3.0 Unported License](http://creativecommons.org/licenses/by-sa/3.0/).
 
-This documentation is rendered online at http://symfony.com/doc/master/cmf/index.html
+~~This documentation is rendered online at http://symfony.com/doc/master/cmf/index.html~~
 
 ## Contributing
 
