README.md: Mention repo migration

Author: bastelfreak

README.md

@@ -8,6 +8,7 @@
 [![Puppet Forge - scores](https://img.shields.io/puppetforge/f/puppet/windows_env.svg)](https://forge.puppetlabs.com/puppet/windows_env)
 [![puppetmodule.info docs](http://www.puppetmodule.info/images/badge.png)](http://www.puppetmodule.info/m/puppet-windows_env)
 [![Apache-2 License](https://img.shields.io/github/license/voxpupuli/puppet-windows_env.svg)](LICENSE)
+[![Donated by Vox Pupuli](https://img.shields.io/badge/donated%20by-Vox%20Pupuli-fb7047.svg)](#transfer-notice)
 
 This module manages (system and user) Windows environment variables.
 
@@ -250,3 +251,7 @@ The [puppet-windows-path](https://github.com/basti1302/puppet-windows-path)
 module by Bastian Krol was the starting point for this module.
 puppet-windows_env got migrated from [badgerious](https;//github.com/badgerious)
 to Vox Pupuli.
+
+## Transfer notice
+
+This module was previously maintained by Vox Pupuli. It was migrated to Puppet/Perforce in 2023.