typo in HERO5-Commands.md

[dickshaydle]

there is a typo in https://github.com/KonradIT/goprowifihack/blob/master/HERO5/HERO5-Commands.md

it should be http://10.5.5.9/gp/gpControl/setting/4/3 not http://10.5.5.9/gp/gpControl/4/3

Thanks for the great work!