[ImgBot] Optimize images

*Total -- 2,100.53kb -> 1,835.91kb (12.6%)

/Images/1.png -- 374.57kb -> 319.26kb (14.77%)
/Images/5.png -- 307.35kb -> 265.49kb (13.62%)
/Images/6.png -- 478.38kb -> 418.15kb (12.59%)
/Images/2.png -- 265.55kb -> 233.82kb (11.95%)
/Images/3.png -- 236.97kb -> 210.36kb (11.23%)
/Images/4.png -- 437.72kb -> 388.85kb (11.17%)

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

Author: ImgBotApp