Vyper board special firmware v2.4.5 release

Vyper board V2.4.5 release

Change log:

1. Add some abnormal popups
2. Add realtime temperature display when preheating and auto leveling
3. Add endstops abnormal popup windows when homing
4. Optimize the detection of power outage

How to

1. Download the main_board_20210902_viper_v2.4.5.rar
2. Extract main_board_20210902_viper_v2.4.5.rar
3. Copy main_board_20210902_viper_v2.4.5.bin to your sd card root directory
4. Power off the machine
5. Insert the sd card to your board sd slot
6. Power on the machine, wait about 1 minute until the upgrade completes
7. Power off the machine and eject sd card
8. Now your board firmware is up to date now