chore(readme): added the Hatchling platform as using project

Author: mpaland

README.md

@@ -185,7 +185,7 @@ Running with the `--wait-for-keypress exit` option waits for the enter key after
 ## Projects Using printf
 - [turnkeyboard](https://github.com/mpaland/turnkeyboard) uses printf as log and generic tty (formatting) output.
 - printf is part of [embeddedartistry/libc](https://github.com/embeddedartistry/libc), a libc targeted for embedded systems usage.
-
+- The [Hatchling Platform]( https://github.com/adrian3git/HatchlingPlatform) uses printf.
 (Just send me a mail/issue/PR to get *your* project listed here)