Change USBasp and bootloadHID bootloaders to lowercase (#14354)

keyboards/7c8/framework/rules.mk

@@ -2,7 +2,7 @@
 MCU = atmega328p
 
 # Bootloader selection
-BOOTLOADER = USBasp
+BOOTLOADER = usbasploader
 
 BOOTMAGIC_ENABLE = no       # Enable Bootmagic Lite
 MOUSEKEY_ENABLE = yes
@@ -19,4 +19,4 @@ AUDIO_ENABLE = no
 FAUXCLICKY_ENABLE = no
 LAYOUTS_HAS_RGB = no
 ENCODER_ENABLE = yes
-LEADER_ENABLE = yes
+LEADER_ENABLE = yes