Change memory management strategy to heap_2
Change memory management strategy to heap_2

FreeRTOS assertion suggest we use heap_2~4 instead heap_1

ming6842/firmware,shengwen1997/moonbear-firmware,shengwen1997/moonbear-firmware,ming6842/firmware-new,UrsusPilot/firmware,shengwen1997/moonbear-firmware,UrsusPilot/firmware,zxc2694/moonbear-firmware,ming6842/firmware-new,fboris/firmware,ming6842/firmware,fboris/firmware,fboris/firmware,ming6842/firmware,UrsusPilot/firmware,ming6842/firmware-new,zxc2694/moonbear-firmware,zxc2694/moonbear-firmware