[ImgBot] Optimize images

*Total -- 687.32kb -> 588.53kb (14.37%)

/Edge Detection/Sample_Output.png -- 13.16kb -> 8.14kb (38.12%)
/ImageToSketch/sketches/hulk/hulk(blured).png -- 18.24kb -> 12.69kb (30.4%)
/Calendar GUI/Calendar for the year.png -- 141.02kb -> 111.78kb (20.73%)
/Calendar GUI/Input Calendar.png -- 21.26kb -> 17.10kb (19.58%)
/Desktop-drinkWater-Notification/output.jpg -- 135.61kb -> 113.79kb (16.09%)
/Image Processing/default.jpg -- 123.46kb -> 105.59kb (14.48%)
/ImageToSketch/sketches/hulk/hulk(final).png -- 16.43kb -> 14.51kb (11.72%)
/Face-Mask-Detection/Sample-images/Method.jpg -- 59.13kb -> 53.67kb (9.24%)
/ImageToSketch/sketches/hulk/hulk(gray).png -- 23.11kb -> 21.75kb (5.89%)
/ImageToSketch/sketches/hulk/hulk(inverted).png -- 23.08kb -> 21.75kb (5.77%)
/Edge Detection/Sample_Input.jpg -- 91.21kb -> 86.21kb (5.48%)
/Face-Mask-Detection/Sample-images/Sample_image_3.jpg -- 10.56kb -> 10.51kb (0.44%)
/Face-Mask-Detection/Sample-images/Sample_image_1.jpg -- 11.02kb -> 11.02kb (0.04%)

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

Author: ImgBotApp