[Keyboard] Update rules.mk (#5370)

MOUSEKEY_ENABLED = yes
by default

keyboards/handwired/jotanck/rules.mk

@@ -48,7 +48,7 @@ OPT_DEFS += -DINTERRUPT_CONTROL_ENDPOINT
 #
 
 BOOTMAGIC_ENABLE = no       # Virtual DIP switch configuration(+1000)
-MOUSEKEY_ENABLE = no       # Mouse keys(+4700)
+MOUSEKEY_ENABLE = yes       # Mouse keys(+4700)
 EXTRAKEY_ENABLE = yes       # Audio control and System control(+450)
 CONSOLE_ENABLE = yes         # Console for debug(+400)
 COMMAND_ENABLE = no        # Commands for debug and configuration