README: add special thanks

Author: BLeeEZ

README.md

@@ -57,3 +57,5 @@ For more information, and to participate in the public beta releases, please vis
 - [iOS 11 Glyphs](https://icons8.com/ios) by [Icons8](https://icons8.com) is licensed under [Good Boy License](https://icons8.com/good-boy-license/)
 
 **Amperfy license:** [GPLv3](https://github.com/BLeeEZ/Amperfy/blob/master/LICENSE)
+
+**Special thanks:** [Dirk Hildebrand](https://apps.apple.com/us/developer/dirk-hildebrand/id654444924)