[ImgBot] Optimize images

*Total -- 103.74kb -> 74.61kb (28.08%)

/example/web/icons/Icon-maskable-512.png -- 20.51kb -> 10.54kb (48.61%)
/example/web/icons/Icon-maskable-192.png -- 5.46kb -> 3.66kb (33.05%)
/example/test/goldens/ci/goldens.png -- 15.12kb -> 11.30kb (25.28%)
/example/test/failures/goldens_masterImage.png -- 15.12kb -> 11.30kb (25.28%)
/example/test/failures/goldens_testImage.png -- 15.15kb -> 11.33kb (25.23%)
/example/test/failures/goldens_maskedDiff.png -- 16.31kb -> 12.40kb (23.97%)
/example/test/failures/goldens_isolatedDiff.png -- 16.07kb -> 14.10kb (12.28%)

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

Author: ImgBotApp