[ImgBot] Optimize images (#123)

*Total -- 813.12kb -> 767.01kb (5.67%)

/docs/testing-playground-com.gif -- 674.87kb -> 633.22kb (6.17%)
/public/36-production.png -- 2.39kb -> 2.27kb (4.82%)
/public/310-production.png -- 33.07kb -> 31.55kb (4.59%)
/public/180-production.png -- 13.15kb -> 12.70kb (3.37%)
/public/192-production.png -- 12.02kb -> 11.63kb (3.26%)
/public/152-production.png -- 10.91kb -> 10.56kb (3.25%)
/public/150-production.png -- 10.61kb -> 10.27kb (3.22%)
/public/120-production.png -- 8.04kb -> 7.79kb (3.19%)
/public/144-production.png -- 9.53kb -> 9.23kb (3.17%)
/public/32-production.png -- 1.98kb -> 1.92kb (2.96%)
/public/114-production.png -- 7.66kb -> 7.44kb (2.88%)
/public/57-production.png -- 3.75kb -> 3.68kb (1.8%)
/public/96-production.png -- 5.54kb -> 5.44kb (1.69%)
/public/48-production.png -- 2.75kb -> 2.71kb (1.63%)
/public/72-production.png -- 4.34kb -> 4.27kb (1.58%)
/public/60-production.png -- 3.78kb -> 3.73kb (1.5%)
/public/70-production.png -- 4.15kb -> 4.09kb (1.46%)
/public/76-production.png -- 4.59kb -> 4.52kb (1.43%)

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

Co-authored-by: ImgBotApp <ImgBotHelp@gmail.com>

Author: imgbot[bot]