Update Green_Gateway.md
Created by: silver2row
Adding Content for Flashing and WiFi usage on the BBGG
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Updated to GitLab 16.11.9. Please report issues on https://forum.beagleboard.org/c/site-feedback/2.
Created by: silver2row
Adding Content for Flashing and WiFi usage on the BBGG
Open hardware computers for makers, educators and professionals