add checkra1n to credits

README.md

@@ -82,6 +82,7 @@ If you want to make a rootless repo, use the official [palera1n repo](https://gi
     - For the patching and booting commands
     - Adding tweak support
 - [Amy](https://github.com/elihwyma) for the Pogo app
+- [checkra1n](https://github.com/checkra1n) for the base of the kpf
 - [nyuszika7h](https://github.com/nyuszika7h) for the script to help get into DFU
 - [the Procursus Team](https://github.com/ProcursusTeam) for the amazing bootstrap
 - [F121](https://github.com/F121Live) for helping test