[ImgBot] Optimize images

*Total -- 2,052.87kb -> 1,601.61kb (21.98%)

/basic_data_structure/array/array4.png -- 46.76kb -> 27.53kb (41.12%)
/leetcode/two_pointers/container_with_most_water.png -- 47.48kb -> 28.32kb (40.35%)
/leetcode/greedy_algorithm/jump_game_ii.png -- 114.71kb -> 70.99kb (38.11%)
/basic_data_structure/array/array2.png -- 44.73kb -> 29.53kb (33.99%)
/js/event_loop_in_node.png -- 391.84kb -> 267.34kb (31.77%)
/basic_data_structure/array/array1.png -- 43.22kb -> 30.53kb (29.35%)
/basic_data_structure/array/array3.png -- 35.76kb -> 25.52kb (28.63%)
/basic_data_structure/array/array0.png -- 22.16kb -> 15.86kb (28.43%)
/js/event_loop_in_browser.png -- 355.21kb -> 260.53kb (26.65%)
/leetcode/backtracking/回溯算法.png -- 77.93kb -> 59.18kb (24.07%)
/leetcode/dynamic_programming/动态规划.png -- 178.64kb -> 141.33kb (20.88%)
/leetcode/greedy_algorithm/贪心算法.png -- 111.08kb -> 89.35kb (19.56%)
/leetcode/greedy_algorithm/burst_balloons.png -- 181.21kb -> 165.58kb (8.63%)
/js/event_loop_structure_in_browser.jpg -- 402.12kb -> 390.01kb (3.01%)

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