Add FIRMWARE_FORMAT = hex for /keyboards/kinesis/kint36 and /keyboards/kinesis/kint41 (#14665)
* Specify hex as the default FIRMWARE_FORMAT which is copied to qmk_firmware root folder
* Specify hex as the default FIRMWARE_FORMAT which is copied to qmk_firmware root folder
Co-authored-by: sadkins <sadkins@iMac-Pro.local>