docs(readme): add rename clarification (#6926)

* docs(readme): add rename clarification

fixes #6925 

Not 100% sure of the wording, so feel free to edit or reword it :)

* Update README.md

---------

Co-authored-by: Martin Jagodic <jagodicmartin1@gmail.com>

README.md

@@ -2,7 +2,7 @@
 
 [![GitHub license](https://img.shields.io/badge/license-MIT-blue.svg)](https://github.com/decaporg/decap-cms/blob/master/LICENSE) [![Netlify Status](https://api.netlify.com/api/v1/badges/8b87160b-0a11-4f75-8050-1d21bc1cff8c/deploy-status)](https://app.netlify.com/sites/decap-www/deploys) [![npm version](https://img.shields.io/npm/v/decap-cms.svg?style=flat)](https://www.npmjs.com/package/decap-cms) [![Build Status](https://github.com/decaporg/decap-cms/workflows/Node%20CI/badge.svg)](https://github.com/decaporg/decap-cms/actions?query=branch%3Amaster+workflow%3A%22Node+CI%22) [![FOSSA Status](https://app.fossa.com/api/projects/git%2Bgit.luolix.top%2Fdecaporg%2Fdecap-cms.svg?type=shield&issueType=license)](https://app.fossa.com/projects/git%2Bgit.luolix.top%2Fdecaporg%2Fdecap-cms?ref=badge_shield) [![PRs Welcome](https://img.shields.io/badge/PRs-welcome-brightgreen.svg)](https://github.com/decaporg/decap-cms/blob/master/CONTRIBUTING.md)
 
-[decapcms.org](https://www.decapcms.org/) 
+[decapcms.org](https://www.decapcms.org/) (formerly known as Netlify CMS)
 
 A CMS for static site generators. Give users a simple way to edit
 and add content to any site built with a static site generator.
@@ -50,3 +50,5 @@ Please make sure you understand its [implications and guarantees](https://writin
 ## Maintainers
 
 Maintained with care by <a href="https://techhub.p-m.si/">PM</a> & friends.
+
+Decap CMS is the new name of Netlify CMS [since February 2023](https://www.netlify.com/blog/netlify-cms-to-become-decap-cms/).