[ImgBot] Optimize images

*Total -- 10,028.98kb -> 9,496.79kb (5.31%)

/img/ColdFrame-v2.jpg -- 4,114.92kb -> 3,867.29kb (6.02%)
/img/ColdFrame-dash.jpg -- 2,929.53kb -> 2,768.64kb (5.49%)
/img/ColdFrame-v1.jpg -- 2,984.53kb -> 2,860.86kb (4.14%)

Signed-off-by: ImgBotApp <[email protected]>

Author: ImgBotApp