[ImgBot] Optimize images

*Total -- 483.43kb -> 334.41kb (30.83%)

/Hangman-Game/hangman1.png -- 29.35kb -> 16.06kb (45.27%)
/Hangman-Game/hangman0.png -- 28.08kb -> 15.40kb (45.17%)
/Hangman-Game/hangman2.png -- 29.41kb -> 16.22kb (44.84%)
/Hangman-Game/hangman3.png -- 30.40kb -> 16.78kb (44.82%)
/Hangman-Game/hangman4.png -- 30.37kb -> 16.86kb (44.48%)
/Hangman-Game/hangman5.png -- 30.77kb -> 17.15kb (44.27%)
/Hangman-Game/hangman6.png -- 31.09kb -> 17.40kb (44.04%)
/Shortest-Path-Finder (GUI)/1. Marked Start and End Point.png -- 91.13kb -> 72.36kb (20.59%)
/Shortest-Path-Finder (GUI)/3. Shortest Path marked in Purple by the Algorithm.png -- 91.50kb -> 73.12kb (20.09%)
/Shortest-Path-Finder (GUI)/2. Made Obstacles.png -- 91.32kb -> 73.05kb (20.01%)

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

Author: ImgBotApp