[ImgBot] Optimize images

*Total -- 3,763.79kb -> 3,450.13kb (8.33%)

/screenshots/2.jpg -- 127.23kb -> 114.91kb (9.68%)
/screenshots/6.jpg -- 206.09kb -> 186.16kb (9.67%)
/session/public/img/pfp.jpg -- 6.17kb -> 5.58kb (9.52%)
/screenshots/3.jpg -- 166.09kb -> 150.93kb (9.13%)
/session/public/img/logo.png -- 2,603.53kb -> 2,385.23kb (8.38%)
/screenshots/5.jpg -- 188.11kb -> 173.28kb (7.88%)
/screenshots/4.jpg -- 147.95kb -> 137.02kb (7.39%)
/screenshots/1.jpg -- 318.63kb -> 297.04kb (6.78%)

Signed-off-by: ImgBotApp <ImgBotHelp@gmail.com>

Author: ImgBotApp