[ImgBot] Optimize images (#21)

*Total -- 15,569.03kb -> 12,986.29kb (16.59%)

/Images/human_annotations.png -- 254.62kb -> 130.73kb (48.65%)
/Images/sagemaker7.png -- 273.22kb -> 154.33kb (43.52%)
/Images/freq_cnt_demo.png -- 135.52kb -> 76.74kb (43.37%)
/Images/sagemaker4.png -- 169.43kb -> 97.85kb (42.25%)
/Images/sagemaker1.png -- 110.61kb -> 67.75kb (38.74%)
/Images/sagemaker2.png -- 438.18kb -> 279.07kb (36.31%)
/Images/sagemaker3.png -- 279.65kb -> 180.73kb (35.37%)
/Images/pred.png -- 300.28kb -> 235.57kb (21.55%)
/Images/sagemaker5.png -- 203.13kb -> 160.54kb (20.97%)
/Images/dataloader_batch_result.png -- 3,127.73kb -> 2,485.17kb (20.54%)
/Images/pytorch_transform_flood_tiny.png -- 1,860.73kb -> 1,479.57kb (20.48%)
/Images/sagemaker6.png -- 369.50kb -> 301.69kb (18.35%)
/Images/custom_flood_tiny_dataset_output.png -- 3,663.75kb -> 3,173.65kb (13.38%)
/Images/010_0775_4365f589-de67-4561-8fdd-f1ac1ac1ae07.jpg -- 3,892.11kb -> 3,678.62kb (5.49%)
/Images/cm.png -- 36.63kb -> 35.16kb (4.01%)
/Images/Label_Human.png -- 16.26kb -> 15.65kb (3.72%)
/Images/testimages.png -- 437.68kb -> 433.47kb (0.96%)

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Co-authored-by: ImgBotApp <ImgBotHelp@gmail.com>

Author: imgbot[bot]