[ImgBot] Optimize images

*Total -- 48.64kb -> 29.80kb (38.73%)

/img/projects/factorio-balancers-icon.png -- 26.17kb -> 12.23kb (53.27%)
/img/branding/jg-modern.png -- 2.95kb -> 1.79kb (39.21%)
/img/projects/cellular-automata-icon.png -- 1.01kb -> 0.64kb (36.67%)
/img/projects/mass-hysteria-icon.png -- 11.52kb -> 8.86kb (23.08%)
/img/projects/map-generator-icon.png -- 3.72kb -> 3.13kb (16.07%)
/img/projects/word-a-day-icon.png -- 3.26kb -> 3.15kb (3.45%)

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

Author: ImgBotApp