[ImgBot] Optimize images

*Total -- 484.45kb -> 458.51kb (5.35%)

/readme-images/MediaPlayerFX.png -- 17.71kb -> 15.08kb (14.84%)
/readme-images/PDF-To-Image.png -- 19.42kb -> 16.71kb (13.93%)
/readme-images/CPU-SCHEDULER.png -- 20.37kb -> 18.16kb (10.84%)
/readme-images/header-white-bg.png -- 56.28kb -> 50.28kb (10.66%)
/readme-images/TicTacToe.png -- 19.61kb -> 17.85kb (8.98%)
/readme-images/header.png -- 32.76kb -> 30.24kb (7.69%)
/readme-images/imgToICO.png -- 58.63kb -> 56.27kb (4.04%)
/readme-images/ColorsDatabase.png -- 27.32kb -> 26.29kb (3.76%)
/readme-images/BooksDatabase.png -- 24.74kb -> 23.85kb (3.57%)
/readme-images/Hotel.png -- 49.10kb -> 47.66kb (2.94%)
/readme-images/changeTextCase.png -- 34.63kb -> 33.80kb (2.39%)
/readme-images/AgeCalculator.png -- 40.02kb -> 39.31kb (1.77%)
/readme-images/RandomNumGenerator.png -- 56.06kb -> 55.45kb (1.08%)
/readme-images/Notes.png -- 27.80kb -> 27.55kb (0.89%)

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

Author: ImgBotApp