Fix bootloader for Maypad (#8411)

keyboards/keyhive/maypad/rules.mk

@@ -9,7 +9,7 @@ MCU = atmega32u4
 #   QMK DFU      qmk-dfu
 #   ATmega32A    bootloadHID
 #   ATmega328P   USBasp
-BOOTLOADER = atmel-dfu
+BOOTLOADER = caterina
 
 # Build Options
 #   change yes to no to disable