[ImgBot] Optimize images

*Total -- 49.63kb -> 35.51kb (28.45%)

/public/hacktoberfest.png -- 12.03kb -> 6.11kb (49.22%)
/public/horizontal_beige.png -- 15.90kb -> 8.66kb (45.55%)
/src/app/android-chrome-512x512.png -- 12.63kb -> 11.77kb (6.84%)
/public/favicon.svg -- 0.56kb -> 0.55kb (1.74%)
/src/app/favicon.svg -- 0.56kb -> 0.55kb (1.74%)
/src/app/apple-icon.png -- 3.90kb -> 3.87kb (0.95%)
/src/app/android-chrome-192x192.png -- 4.04kb -> 4.00kb (0.8%)

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

Author: ImgBotApp