[ImgBot] Optimize images

[ImgBot] Optimize images

*Total -- 4,261.21kb -> 2,924.77kb (31.36%)

/docs/ds/images/linked-list1.png -- 31.76kb -> 12.49kb (60.67%)
/docs/ds/images/linked-list2.png -- 35.48kb -> 14.10kb (60.26%)
/docs/intro/images/latex-for-beginners-15.png -- 39.15kb -> 15.71kb (59.88%)
/docs/graph/images/treehash1.png -- 59.38kb -> 24.46kb (58.81%)
/docs/intro/images/latex-for-beginners-3.png -- 33.32kb -> 13.74kb (58.77%)
/docs/graph/images/scc1.png -- 45.74kb -> 18.97kb (58.53%)
/docs/intro/images/latex-for-beginners-13.png -- 43.65kb -> 18.13kb (58.47%)
/docs/intro/images/latex-for-beginners-1.png -- 51.89kb -> 21.65kb (58.29%)
/docs/ds/images/linked-list3.png -- 24.30kb -> 10.15kb (58.23%)
/docs/intro/images/latex-for-beginners-5.png -- 40.32kb -> 16.85kb (58.21%)
/docs/intro/images/latex-for-beginners-2.png -- 55.85kb -> 23.49kb (57.95%)
/docs/intro/images/latex-for-beginners-4.png -- 41.92kb -> 17.68kb (57.83%)
/docs/intro/images/latex-for-beginners-7.png -- 47.34kb -> 19.99kb (57.78%)
/docs/intro/images/latex-for-beginners-8.png -- 23.41kb -> 9.95kb (57.52%)
/docs/intro/images/latex-for-beginners-9.png -- 24.82kb -> 10.64kb (57.11%)
/docs/string/images/ac-automaton3.png -- 78.09kb -> 33.58kb (56.99%)
/docs/intro/images/latex-for-beginners-14.png -- 58.04kb -> 25.08kb (56.78%)
/docs/intro/images/latex-for-beginners-11.png -- 5.66kb -> 2.50kb (55.93%)
/docs/string/images/ac-automaton2.png -- 49.29kb -> 22.52kb (54.32%)
/docs/intro/images/latex-for-beginners-12.png -- 13.18kb -> 6.07kb (53.94%)
/docs/intro/images/latex-for-beginners-10.png -- 25.12kb -> 12.05kb (52.02%)
/docs/intro/editor/images/vscode-3.png -- 150.08kb -> 83.68kb (44.25%)
/docs/intro/editor/images/vscode-2.png -- 62.94kb -> 38.27kb (39.21%)
/docs/intro/images/htc-9.png -- 146.71kb -> 95.03kb (35.22%)
/docs/intro/images/htc-1.png -- 134.34kb -> 88.21kb (34.34%)
/docs/intro/images/htc-2.png -- 160.48kb -> 105.48kb (34.27%)
/docs/intro/images/htc-5.png -- 173.58kb -> 114.72kb (33.91%)
/docs/string/images/ac-automaton4.png -- 66.51kb -> 44.37kb (33.28%)
/docs/intro/images/htc-7.png -- 114.85kb -> 76.65kb (33.26%)
/docs/intro/images/htc-4.png -- 139.69kb -> 93.85kb (32.82%)
/docs/intro/images/htc-8.png -- 194.05kb -> 130.73kb (32.63%)
/docs/string/images/ac-automaton1.png -- 39.91kb -> 28.39kb (28.85%)
/docs/misc/images/stern-brocot1.png -- 31.09kb -> 22.50kb (27.62%)
/docs/ds/images/kdt1.jpg -- 27.36kb -> 19.96kb (27.02%)
/docs/intro/images/htc-6.png -- 215.91kb -> 158.94kb (26.39%)
/docs/ds/images/cartesian-tree2.png -- 215.87kb -> 161.00kb (25.42%)
/docs/intro/images/alipay.png -- 85.02kb -> 64.45kb (24.2%)
/docs/geometry/images/triangulation-1.png -- 77.19kb -> 59.96kb (22.33%)
/docs/ds/images/cartesian-tree1.png -- 36.97kb -> 29.23kb (20.94%)
/docs/ds/images/avl2.jpg -- 36.51kb -> 29.28kb (19.79%)
/docs/ds/images/avl3.jpg -- 39.64kb -> 32.18kb (18.83%)
/docs/graph/flow/images/2148.png -- 51.78kb -> 42.04kb (18.81%)
/docs/graph/flow/images/2150.png -- 67.18kb -> 55.22kb (17.8%)
/docs/intro/images/cf-tool1.jpg -- 64.23kb -> 54.18kb (15.64%)
/docs/graph/flow/images/1152.png -- 729.38kb -> 615.45kb (15.62%)
/docs/ds/images/avl1.jpg -- 15.83kb -> 13.37kb (15.59%)
/docs/ds/images/kdt2.jpg -- 39.03kb -> 33.21kb (14.91%)
/docs/string/images/trie1.png -- 52.88kb -> 46.18kb (12.67%)
/docs/intro/images/wechat.png -- 24.05kb -> 21.11kb (12.23%)
/docs/intro/images/cf-tool2.jpg -- 106.79kb -> 94.51kb (11.5%)
/docs/lang/csl/images/container1.png -- 120.43kb -> 110.53kb (8.22%)
/docs/intro/images/latex-for-beginners-6.png -- 13.21kb -> 12.31kb (6.8%)

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