[ImgBot] Optimize images

*Total -- 13,277.89kb -> 11,222.72kb (15.48%)

/ShortenLinks/output.png -- 47.48kb -> 14.81kb (68.8%)
/Countdown Timer/screenshot_2.png -- 11.63kb -> 5.47kb (52.96%)
/Countdown Timer/screenshot_1.png -- 11.02kb -> 5.67kb (48.5%)
/password-validator/screenshot_3.png -- 32.44kb -> 16.96kb (47.72%)
/Number Guessing Game/script_screenshot.png -- 69.16kb -> 37.60kb (45.63%)
/password-validator/screenshot_1.png -- 35.00kb -> 19.57kb (44.09%)
/password-validator/screenshot_2.png -- 37.82kb -> 21.38kb (43.46%)
/Web Dev with Flask/readme media/1.png -- 1,140.49kb -> 733.18kb (35.71%)
/RandomPassword/password1.png -- 38.51kb -> 27.94kb (27.44%)
/Notification/screenshot.png -- 51.61kb -> 40.56kb (21.41%)
/Compress Image/original_image.jpg -- 7,116.99kb -> 5,906.93kb (17%)
/Web Dev with Flask/static/images/thankyou.jpg -- 109.61kb -> 97.64kb (10.92%)
/Image Grayscalling/GrayScaled_demo.jpg -- 1,575.39kb -> 1,467.70kb (6.84%)
/Image Grayscalling/demo.jpg -- 1,707.56kb -> 1,592.09kb (6.76%)
/Web Dev with Flask/static/images/pic03.jpg -- 23.53kb -> 22.35kb (5.04%)
/photo editor/lary.png -- 1,226.29kb -> 1,169.55kb (4.63%)
/photo editor/images.jpg -- 43.36kb -> 43.31kb (0.11%)

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

Author: ImgBotApp