[ImgBot] Optimize images

*Total -- 801.28kb -> 745.42kb (6.97%)

/plots/lda_real_pred_bin.png -- 53.16kb -> 48.73kb (8.33%)
/plots/qda_real_pred_bin.png -- 52.54kb -> 48.29kb (8.07%)
/plots/knn_real_pred_bin.png -- 56.90kb -> 52.38kb (7.95%)
/plots/qsvm_real_pred_multi.png -- 121.93kb -> 112.89kb (7.41%)
/plots/lda_real_pred_multi.png -- 91.49kb -> 85.21kb (6.86%)
/plots/qda_real_pred_multi.png -- 88.05kb -> 82.10kb (6.76%)
/plots/lsvm_real_pred_multi.png -- 91.09kb -> 84.98kb (6.7%)
/plots/knn_real_pred_multi.png -- 96.89kb -> 90.64kb (6.45%)
/plots/qsvm_real_pred_bin.png -- 76.46kb -> 71.75kb (6.16%)
/plots/lsvm_real_pred_bin.png -- 72.78kb -> 68.45kb (5.96%)

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

Author: ImgBotApp